Many guys think they can start a lawn service on a $3k ZTR and I agree...it may get them through one or two seasons so they can make enough money to upgrade. But they can also shoot themselves in the foot by underbuying, getting a good customer base and then having a component failure problem where they miss many of their customers(who will immediately abandon them for another service when their lawn needs cutting and you aren't available. My Gravely is a fully Commercial ZTR and I would not hesitate to mow 10-20 yards a week with it. If you want to chance mowing 10-20 yards a week on that SD54 go for it. Changed hydro oil at < 33 hours????? Most mfr's recommend first change at 75 hours. What made you think that you run yours so much harder that it required a hydro service so early??? BTW, I wouldn't trade my Gravely for two Raptor SD54's....at an even trade!!!
Only thing I am going to add is if you was going to cut 20 yards a week then the smart move would be to trade your one mower for two new raptors.
Now before you go off the deep end I will tell you why.
If you are doing lawn care for a living it would be better to have the two cheaper raptors then your high dollar gravely.
This is how it plays out you are cutting a yard and feeling proud with the big mower then BANG hydro goes out. Takes the dealer that you brag about that takes good care of you 3 weeks to fix it. And his loaner mower is being used by some other guy that does not have two mowers. Now you have no yards to cut.
The guy with the two cheaper mowers BANG a hydro goes out. Uses the other one to put the broke one on the trailer and keeps cutting his yards.
Best to have two cheap mowers then one high dollar mower.
For anyone to get into lawn care and not have more then one of everything makes him a fool.
If all he can afford is one raptor then he
needs to buy a used rider as a back up.
This is not fact but just my opinion