I agree with the comments on resale. Nothing is going to out do the Kubota in that department. I don't even think small JDs hold their value as well but here in New England we don't see as many JDs for sale. People ask stupid prices for 15 year old Kubotas and presumably are successful. Mahindras and Kiotis don't hold even 10% of the market share that Kubota does so it is harder to say how well they will hold their value over time but they are certainly not being sold for fire sale prices like the Belarus or discredited brands. Still, if resale is the biggest consideration, you cannot go wrong by getting the Kubota.
My only gripe with the Kubota is that the company dumbs down the
B7510/7610/7800 partly, IMHO, to make sure they don't compete with the more profitable
B2630/3030. They have purposefully not updated those tractor designs or added features that are standard on literally every other tractor brand (e.g. position control) just to make sure they can upcharge for the
B2630/3030 series. The only other downside, given the work you plan, is that the 7510 has a weaker loader by a fair amount than either the Mahindra, Kioti or TYM as well as being lighter than desirable for ground engaging work.
Bottom line: You really cannot make a bad mistake by choosing any of the tractors you are considering.