I know 3 guys that run mowing business that have to replace their mowers every couple of years. At $10,000 to $15,000 per mower. That does not include all the pumps and wheel motors they replace as well.
There is a big difference when you have employees running your machines, I run a mowing business and a new mower lasts me at least 10-15 years but closer to 20 and I have yet to replace a pump or a wheel motor, however I do agree maintenance is critical. Presently my oldest is a 1998 model, over time I have replaced an engine and a deck and a transmission and probably every other major component at least once but I've also learned what causes them to break and in time have gotten better in preventing myself from abusing the machine in such a manner to begin with.
Inexperience, lack of concern (or lack of skin in the game), the trademarks of paid employees running someone else's machines...
I've watched these guys sitting under a tree taking a break, the machine is left running so the hour meter won't stop.
Don't get me wrong, the slave driver wants these kids working in 108 degree temperature without concern as well, I get it.
But if you buy, operate and maintain your own machine I dare say your mileage should increase, theoretically at least.
As for the OP...
See if you can find a dealer who will let you demo a machine.