I would first check into how many companies in your area are doing it already. The jobs don't pay all that well and go to the lowest bidder so if you have a lot of competition... and you have to pry any travel money out of them. I had a company want to pay me 20$ for an inspection that takes about 30 minutes to do well AND it was over a 100mi round trip, acted like I was trying to rip them off for asking for more money. It is cutthroat with the big preservation companies. On the other hand if you are the only one in your area, say a 25-50mi radius... you can get paid.