Bob, it sounds like you got a good deal. And it sounds like you know your way around a mower.
My son and I bought 2 new Scags this year, a Turf Tiger and a V-Ride. We shopped carefully and think that they are the best mowers around for heavy duty commercial use. They are built like a tank.
You should still have a lot of life left in that TT. Good luck with your restoration.