Agreed, your problems don't inspire a great deal of faith, in this particular tractor, but there are a lot of people here on this board that their Kioti's have been rock solid for them.
You have a very valid concern about once the tractor is out of warranty. So far, your dealer seems to have been very good about trying to make things right. I would expect for that to continue. What I might suggest, is that you have him aid you in approaching corporate and have them extend your warranty. Eventually, these flaws will have to reach an end all everything needing correcting will have been done. I don't think that your tractor can continue this pace of breakdowns indefinitely. At this pace you will own a new tractor, just piece by piece. They might decide to swap out your tractor for a new one of similar make and model. That might be the cheaper route for them instead of extending your warranty and the costs incurred with all the labor rates and parts they are spending on the current tractor.
As for not being enough tractor, you know what you need and how well the present tractor can or can't do what you are asking of it. It clouds the waters on what course of action Kioti might take. Best scenario, they might take your original purchase price and apply it towards the larger tractor you might be considering, with you paying the balance of the price difference. I realize that in our legal system, people are often rewarded for pain and suffering, which you have, in a way, incurred. Kioti is in business to make money, I would be highly surprised that they would upgrade you into the larger model out of the goodness of their heart. Who knows, stranger things have happened.
A lot of this is going to boil down to how well the dealer and your regional rep will go to bat for you with corporate. It seems that your dealer is in your corner, I hope the rep is to.
I wish you the best in a tough situation. It is a tool, a very expensive one, and it is supposed to work when you want it to. For it not to, is truly a frustrating and trying experience. There are a lot of people following your situation and pulling for you. Please keep us informed of your progress. For people in the future considering Kioti, this thread could really help them in deciding about a purchase. Not so much that this ruins the brand, but it is more a testament to what kind of support Kioti will be giving to a possible customer. As so many others have stated, color of the tractor is not so much the most important factor, but what kind of support the dealer and manufacturer give after the sale. In my book, this is a big moment and opportunity for Kioti to step up to the plate and show A LOT of people that they are very serious about standing behind their product and working at customer satisfaction and therefore developing excellent brand loyalty.
Congrats on the upgrade, was reading the beginning of thread and didn't see the resolution till now. Glad that you seem to have resolved your problem with what seems a fair and equitable solution for you.
Enjoy that new tractor smell in your cab!