You said you were familiar with grows. How many of the grows you have seen use this kind of equipment? ER: small metal boxes loaded with equipment?
Second, do you realize how much work this could be? Go look at Al B' Fucts setup on how to grow a lb every 2 weeks. He has to work 4-6 days a week 10 hours solid just trimming the final product. You could be looking at 40 hours a month just trimming alone.
Third, do you know what a MSRP is? (Manufacturers Suggested Retail Price) It is a bullshit number pulled out of thin air to make you think you are getting a great deal when you pay 1/2 of that...
Fourth, find some people (other than the manufacturers testimonials) that actually use the system and rave about it.
Fifth, have you figured out how to unload 50# of product?
Hopefully by this point reality is starting to dawn...
There is no foolproof system, nor one that is easy maintenance in the size you are referring to.
However, if you spend 2 weeks just doing research here on RIU and realize that yes, you actually have to build something and that growing is alot of work then you can easily save yourself $10,000 to $20,000 off the price.
You could have a system that grows a minimum of 25# of product a year for $5,000 or less depending on AC needs.