Gryantaylor,
As a long term amputee, the BX24 works real well for me as a
4wd wheelchair. It allows me much freedom and on those days when I can't stand, transferring to the BX does not require a lift. (however, it does require some upper body strength) The BX could fill all the activities you mentioned as long as you are not talking about 20 or more acres of stuff to do.
I especially like PILOON's nipple idea on the treadle. All this time I have been using my crutch on those bad days. Hmmmm, another modification is on the way for the BX.
The downside I have with the BX is getting into the seat for the backhoe. But that's another story.
Good luck,
Carl