Since you have a two-year warranty on your tractor, you can certainly take that time to see what experience shows you about needing the extended warranty. I have never purchased one on any vehicle I own and I have always come out ahead. I really think these are a "cash cow" for dealers. What I wish is that my dealer would offer me a simple "service contract" which would cover all scheduled service, filters, fluids, etc. for say...5 years or more. If they offered a slight discount, I think I would be happy to pay for something like that. Who knows, some dealers may actually offer this.
JimI