A subcompact tractor is adequate for one to three acres. Flat is good.
With the exception of removing stumps over 3" in diameter, your tasks match up to subcompact tractor capabilities.
Subcompact tractor Backhoes are not very powerful. If you task any subcompact tractor too heavily it will go to the shop. (Stumps are in this category.) You should discuss with local dealers if a subcompact tractor Backhoe will prove useful and reliable on your rocky property, bearing in mind that operator experience and operator prudence are important inputs.
These videos may help your decision:
bx23s kubota - YouTube
Buying out-of-state may put you at the rear of the line for warranty service.
Tractor manufactures reimburse dealers for warranty work via pre-set reduced labor rates and pre-set reduced parts prices, so warranty work is only marginally profitable to dealers.
Manufactures limit warranty transportation reimbursement.
Dealers prefer to have the cushion of $1,000 gross profit on a new compact tractor sale before commencing minimally profitable warranty repairs.
Some out-of-state buyers call national HQ to complain about indifferent reception for warranty work at near-home dealer. For national HQ this out-of-state topic is an endlessly playing broken record. Dealers are independent businesses.
What value do you place on hassle-free new tractor warranty service?