All in one controllers are largely unnecessary. You will find that a good dehuey and mini split work better using the built in humidistat and thermostat. Save your cash and buy the digital co2 ppm controller/sniffer on its own. I know of many sealed room growers that bought the all in ones with relays and eventually end up using the ppm sniffer part only. Myself included. Its actually not good to hook up dehueys and minis to the co troller with relays. They cycle the compressor to often leading to premature burn out. It doesnt happen all the time but can happen. Any real pro grower with a sealed room with industrial dehuey (santa fe) and a nice mini split will tell you skip hooking the appliances up to a controller. Using the built in stats in the units themselves is much much better. Take it from someonr who speaks from experience.
Sorry, I've been there and done that and my experience has not always supported your strategy. This is home turf for me and I (respectfully) disagree;
Minisplits are fine for home and shop use, but once you get big you need real deal HVAC tonnage.
An all in one controller can work brilliantly as long as it's set up properly. The excessive cycling you mention is an easy problem to fix; just widen the cooling temperature spread, aka increase rise on the controller.
That said, I do advocate that people get individual devices because if an all in one breaks, you're at zero.
The only time it makes sense to use the device's own thermostat is when it's in the area it's supposed to control. Again, past a certain scale, hanging AC units all over the place becomes a loser's game very quickly. What's needed is remote HVAC with at site air handling, and that means water lines and water cooled air handlers.
A permanent facility- like a home, greenhouse or production facility- can greatly improve its performance and efficiency by installing a water based HVAC system. A chiller or heat pump rejects heat from the cold circuit and pumps the heat to the hot circuit. Cold circuit services WCAH- water cooler air handlers, that simultaneously cool and dehumidify the space.
Also, as facilities get larger it only makes sense to have several environmental sensors scattered about to keep various zones in the right conditions. This necessarily means a larger, distributed monitoring and control system and again, not from the front of the box.
Hot circuit picks up the heat rejected by the heat pump and can heat the house/facility and do many other useful power and thus money saving chores. This boosts efficiency and effectiveness substantially as scale increases, directly reducing operating costs and therefore increasing profits.
I've installed a heat pump in my home and it will heat my house and my domestic hot water with heat rejected from my grow. When's the last time you calculated a return on investment for YOUR furnace?!
