I have purchased 11.5 acres. In cash. I will purchase a 2k sq ft metal building and spray foam the exterior walls at least. Probably all interior as well. I am doing this for myself. As a job for my old age. . Thanknyou for your input. I have been considering living soil. And blumats. For simplicity
sounds awesome! and definitely gives us a better idea of what you are doing.
I would start simple and plan on breaking up your space into a veg and flower area. or better yet 2 - 4 seperate flower areas so that you can have a harvest every month (or every 2 weeks if u did 4 rooms) to keep cash flow going, and minimize the amount you need to trim at same time. also minimizes risk in case something herms or you get PM or something in one space.
Personally I think a 10x20 flower is about all I would want to handle as a one man operation, and have others have noted, that will require help trimming and packing up, and cleaning.
once you have a basic layout I think environmental control such as AC/heating/humidifier/DH/exhaust and possibly C02 if you are going to run sealed rooms is going to be the biggest outlay of cost. then calculate 30-40w sf for your led lighting for your flower spaces and 15-20W sf for veg. calculate all your other power costs and then make sure you can supply all that power.
I would definitely consider paying a consultant w experience in building rooms to help you think this all through.
I will also say that while I share your dream, as others have noted the bottom is going to fall out of the market as soon as federal legalization happens. we are only a couple years away from corporate weed in California. I would focus on craft cannabis and high end if it was me. theres going to be a ton of commercial grade and trim on the market that you will need something special to differentiate yourself and set your own prices.
good luck and blessings!