Yeah, frame mount backhoes look like they're running $4K - $8K depending on brand. I have a deep garage where I intend to keep the tractor and unused implements, so it's possible to leave the backhoe off most of the time, but it's a tradeoff of spending 30 minutes getting the backhoe ready vs scheduling a rental of a mini excavator. Excavators run about $400/day here, which doesn't seem too bad. Just have to figure out when buying makes sense vs renting. But the trouble I had today just digging a 2' hole for a bush today makes me think the backhoe might get used for mundane stuff.
How does the rear snow blade work? Do you drive backwards to push the snow or do you drive through the snow and drag the blade? Tractors are OK just driving through snow? Sounds like fun, actually. Either way, if you set the 3pt right it should be able to just skim the gravel without causing a mess. The trick must be just getting ahead of the snow so you don't end up with 3' to deal with. It's not that bad here that something like that happens often. Most we'll see is 21" or so in a 24 hour period.
I'm definitely thinking smaller implements are the way to go. Smaller is cheaper, takes up less space, and are easier to maneuver. There's no way I can grade the drive in one pass anyway, so what's the difference between 2 passes and 3 other than an hour of my time. Is there any situation where the implement being narrower than the rear tire track is a problem? And can smaller implements, when driven by enough HP on the PTO or enough hydraulics, do the same work that larger ones can, just with less coverage? Like will a 7' brush hog clear bigger saplings than a 4' brush hog will? I just don't want to get a smaller implement if say, it's not geared for doing heavier duty work.
Speaking of tractor size, is there any downside other than cost to getting a 45hp tractor vs a 25hp one? They don't seem that much larger but if it means more reserve power, less likelihood of getting stuck or not being able to do a job, and better resell value (if I ever move back to the city), that might make sense.