Bird
Rest in Peace
I could understand him saying he'd "rather not", but it does seem that he would have offered some explanation as to why he'd rather not. If he's not a Kubota dealer, it may be that obtaining the right parts is more trouble than it's worth (he'd likely have to pay more for parts than a Kubota dealer would pay), may be because his mechanics lack familiarity with Kubotas, may be he's just too busy to take in other brands, not being a Kubota dealer, he might not be able to handle warranty work on them, or any number of other reasons. If I'd been in your place, I'd have asked him why he'd "rather not"; he didn't say he wouldn't do it. I think most businesses have to turn down some jobs.