I have over 35 years experience designing hydroponic systems. Yiur planned grwowing methodology is not an energy or cost efficient system nor is it a cheap low investment system. Its only real avantage is that it will withstand the stresses related to pump circuit failures better than an aero system and that it will not have the root rot problens associatted with small tube aeros systems, NTF systems, poorly constructed Ebb and Flow systems or standard DWC with poor circulation systems.
For large yields and low investment the easiest and cheapest system to set up is a large tube medium pressure aero using an Iwaki md-40RZT or MD-70RZT 15 to 40 psi pump, standard sprayers with pump running 24/7 with solenoids used as a divertor system. That way the spray is intermittant. The large tubes cost $20 to $35 each for a 6" by 20" tube 8 foot long. Depending on which plastic you choose. To assure water delivery you just install a flow valve on your pumps discharge. If at any time it loses flow it triggers a switch supplying power to another circuit supplying poeer to another pump. Of course this will not help for a full power outage but there are always chances such as that with any systems.
I mainly chose to upgrade to air atomized aero as I can long term yiels and also potency without remote building expansions or adding more grow sites. I chose atomized over HP because it is more adjustable and because large air tanks are more economical that many small high pressure accumlator tanks or a large accumulator tank. Plus the air compressors have longer life spans than the HP pumps as well as the fact that the air atomized systems are just energy wise more efficient as water just isn't as compresive as air. Plus ther are more readily adjstbale by using the many many different size nozzles, or adjusting nutrient feed heights ar adjsting air pressure or a combination of those three, plus cycle adjstments. I think over a long period of time the costs with a large system are likely pretty comaparable energy wise. Labor and maintenace costs in the long term would likely be higher with the air atomized system.
IMHO
Neither the HP or air atomized system is a low cost system that is likely cost effective for small grows without also tieing in the other system boosters to allow for high temp (faster) grows such as airconditioning, dehumidification and CO2. It is really not cost effective to have the best nutrient delivery system possible when you can not really utilize it well. Plants don't want just a great nutrient and air root DO delivery suystem. The want a great everything system. For the best results and for the best return on your investments you provibe all conditions opto imixed in a balanced system. Not just a better D and nutrient delivery ssytem. That is like supplying a too high EC, or too much light, or eccessive unneeded CO2 or too much dehumification for the transpiration rate taking place, or excessive temperatures in relation to other pramaters.
High pressure aero is not a fix all. It is merely a best delivery system for DO, water and nutrients that allow you to max out your other parameters and get the bestresulyts in the shortest amount of time. But if the only thing you do is supply HP aero or air atomixed aero all your really doing is growing Bozai mj plants at a higher investment cost. Your cycle time will a ltle shorten as the plants will be smaller but your yield will not be as good without all parameters also being in balance with the high DO, water and nutrient deliver rate. Plus to get the most groth in the shortest cycle you need tebest balance you can provide. It is unlikely that will ever happen without high temps low humidity die to dehumicification and high par through loh ght optomxed for bomzai plants. That means may low wattage halides or HPS the are cooled by water placed just an inch or two above the plant canopy. The smaller light wattages also mean higher initial investments but they allow for low wattage use with closely placed lamps as the high intensity of larger bulbs is not needed with 10" to 18" plants budded in 5 or 6 weeks. That means horizontal lights with parabolic refectors at sizes like 3' by 2' for 2 or 3 foot chambers side by side. Ie SOGS. Luckily I have bought neraly nothing but low wattage halide and HPs for years now. Large wattage lights are not a good choice for SOG plants as the light distribution is far from even at close placement of lights (as is most efficient) and raising the light to get better distribution lowers the PAR too much. IE the only advantage to high watt lights is increased depth of intense lighting (therefore for tall plants, and the fact that 4 250watts light ballasts and bulbs plus four refelectors etc cost motre than one 1000 watt light. But with large grows, ec specially large commercial grows efficiency and better utilization capabilitoes of multiple small lights very quickly offsets the lower initial investment costs of poor utilizable large wattage plants.
IMHO I think big tress will be a much larger challenge for a long time yet to come unless there are more people willing to spend the time and efforts with the much larger testing needed for taller plant grows especially if the grows do not utilize full parameter controls.
IMHO While a tall plant grown indoors looks impressive it just is not as economically and efficiently or quickly grown as a huge number of very quickly grown small plants. Over aperiod of time when total costs are calculated in the indoor SOs grows are juts a higher retum on invetment grwing method than taller more physically impresive looking plants.
