If you have a location (his restaurant), getting proper zoning, city, state, and fed paperwork would be a pain, but not horribly expensive (it would, however, be time consuming). If there is a minimum BBL size requirement of your brewery (hard to believe that they would require you to be bigger than feasible) the equipment would be expensive, but otherwise, it is just a time issue. Go for it. I would in a heartbeat given those circumstances. Worst case, you fail, and get to take home some pro equipment.