There's lots of variables that you haven't included that would be essential questions to the seller.
Correct.
would you pay it?
Robert you are missing the point, how many hours will you need to do every week and how hard will you have to
work to complete this work.
If your going to working flat out 40 hours per week to complete this work then it wouldn't be a good buy in my
opinion.
If its handy and you trust the guy selling it then yes I would pay for it, but buying any round carries certain risks
and only you can judge this.