The price on that 3130 does not sound bad but I know what you mean with the seller being a "tractor jockey." Makes you hesitate.
A couple of thoughts based on what you posted:
1) An
L3400 might fit pretty well. My pasture renters use one and being around it I like the thing. Bigger/heavier than your 9200 for sure but I do not know if they have a mid PTO or can have one added.
2) Someone else suggested
B2150 ? I have 2 of them and they do fit the "bulletproof" concept. Gutsy lovable little beasts. Will stand anything and generally cannot be stalled under load. 4cyl not 3. Most std tran models (both of mine) have 3 ranges one of which is creeper which I find very good doing (rear) snowblowing.
B2150's all seem to have mid PTOs. Both mine do. The
B2150 would be the best small tractor in the 20 some HP range EVER MADE if they just had a synchromesh tranny. Unfortunately they are not synchro at all. I'm no fan of hydrostats bigger than my B2200 lawn mowing rig and no experience with the
B2150 hydro version.
3) Another thought: In your situation as described up to this point (and what you do for a living) I lean to doing this: Use a snow blower on the front of that skid steer instead of a tractor. You have plenty of hydraulic pump to drive one. Put rubber tracks on the skid steer and a hydraulic motor driven snow blower. I am not real attracted to the front mount blowers on Kubotas because of the reliability questions and problems seen reported on these forums. Go read a few for your own impressions. You have 1 or 2 front blower choices on the Kubota and 25 or 30 choices with the skid steer. Far better chance of finding a good one used.