The only advice I can give is consider starting off at least 3 bbl. You can hobble together a 3 bbl system pretty easy, even if you have to back to back batches from a 55 gallon homemade system into 3 bbl fermentors (it's not exactly 3 bbls but get's you close). If the value of the amount of beer you are brewing isn't greater than the value of the amount of time you spent making it then what is the point? You will actually end up spending money to serve people beer and, frankly, that doesn't make any sense.
I would also be personally irritated if I went to drink at a "farm brewery" and then found out out was contract brewed.