I had the same thought as well. Are there 4x4 backhoes? The grapple will be a little more difficult. Might be better to get a larger 4x4 cat 1 tractor and rent a mini ex for the big jobs.
I've had three compact utility tractors (Deere 750, 855, 3033R), and didn't bother with the backhoe on any of them. They take up a lot of space, add a lot of expense, and the number of times I truly need one around here is less than once per year. I've taken to either renting or just hiring someone with a mini-ex when I need something dug, way faster than any POS tiny backhoe on a compact utility tractor. But, if you have more frequent need for one, and you expect that need to continue past some initial period, it could make more sense for you to own one.
I'm also not a fan of any sub-compacts, not because they aren't capable, but because they cost almost as much as a compact. Unless there's some reason you really need something smaller and lighter, you might as well just get a real compact tractor for similar money, and skip the "sub".
I'm with sloeffle on storage. I wouldn't even touch any piece of equipment that's been stored outdoors. Aside from corrosion and paint failure, rubber rots in sun, and the sum of tires and hoses on a tractor with a loader could increase the apparent price of any used machine as much as 50%, once you start having to replace them.
I will also never understand someone so handy that they need a tractor with a loader or backhoe, but simultaneously so helpless they can't erect a simple shed roof or carport, to keep the thing out of the sun and rain. Read: "Lazy". Makes me wonder what else they ignored, in the maintenance of the machine I'm considering for purchase.