Other thoughts:
1) What is his pricing like.........is he working for dirt?? If so, stay away
2) If involved in wood care.......has he been using quality products?? If not, could be buying into a world of headaches
3) How much money is his equipment really worth? Some people have equipment that I wouldnt pay ten dollars for.
4) Why is he selling?
5) If you dont buy it........who will? Could be generating a new competitor........
6) How are you going to pay for this? Is the seller willing to finance some or all of it? I have bought two businesses in the last four years..........both deals included some seller financing. If it is cash he is looking for, might be less desireable for you.
7) If it is commercial work......does he have contracts for the accounts? If not, they are somewhat worthless, for there is no guarantee that they will stay with you.
If all of these thoughts and questions are making you think twice, turn it down for now, and maybe he will not be able to sell it and come down on his price............
Like was said above, you could do a heck of alot on your own for $25,000.