BJ, i dont think your nuts...you sound like a normal person looking to start a business and get a decent living. a close friend of mine 6 yrs ago took a loosing pack & ship where the guy made his customers cry and slept in the back office, paid pennies for it, and turned it into a 500k yr operation. not bad for a 1400 sq ft retail space. now mind you, he already had been in the business so he knew all the ins and outs.
as far as how much he made last yr...EVERYBODY here knows thats totally subjective. with tax loop holes and whatnot, if your smart, you will only let your business make a few thousand dollars. so thats hard to knock...
personally, id like to see his body of work, maybe talk to some of his customers just to get a feel for the place. i dont think his printers or vinyl are worth anything...if you want to do it...id lowball him and get the business for pennies on the dollar, then buy new equipt, spend the money on vinyl and supplies you are going to burn through from your learning curve, maybe even hire an expert to come and walk you through signmaking 101 and stay on a bit till you get comfy.
good luck
mark galoob