I have a Kubota B2420 24hp 4 wheel drive for many years now and can comment on that alone. I would think other Kubota models should be somewhat similar.
We use this tractor to manage 5 acre vegetable farm using a rotavator only. With 4wd, this 24wd is equivalent to 30hp 2wd, but I would not recommend this for ploughing or cultivator for primary tillage. We only rotavate for land preparation.
The tractor has been a reliable workhorse of good quality. We had to change some parts a few times, mainly the arms that connect the tractor and rotavator. The parts are slightly more expensive, just as the tractors are.
Dealer and service network is limited in Telangana but we did not have any major issues since the mechanic travels to farm location for servicing and repairs, and spares availability wasn’t a problem.
I think @Sri has a VST/Mitsubishi in Karnataka and may have info to share.