I hear ya..I don't know then. Maybe just keep using what you have until it dies then make a decision. I mean just because something breaks doesn't mean you have to trash the mower. You may have already answered this, but do you work another job too, or just getting to the age where you are hanging up work soon? I was just wondering. Not sure of your work load. But if you are slamming it and working long days, then you can make a lot of money over the next 3 years or so.I have a very hard time making a payment on something that can't be used for 4-6 months of the year. It takes twice as long to pay it off that way. There is the time factor as well. I want to have more free time and getting 2 more props not only takes that away but also ups the expenses.
If you are just thinking of retiring, then maybe try to keep running what you have. What I am getting at is $1200 for a trans isn't going to break the bank. If you are doing 85-100 grand per year and have to invest another $7000 to get through the next 3 years, it's not that bad of an investment. Keep in mind, you can sell the mower when you are done as well. I mean only you can answer the question. Even if I get out of the business I will keep a commercial mower for myself. I currently rotate my mower out every 2 years anyway. I am all about staying on the ground running, and not being in the shop with things breaking. You just have to decide if you are ready to hang it up or not. I feel sure you can patch the old truck up and get more time out of it. The mower thing, you just need to decide if you are ready to hang it up.