First let me say that I am sorry to hear of your accident. I hope that you will recover to the greatest extent possible.
I have a dolly for my MMM, which makes it pretty easy to roll it in and out of position on my garage slab. I also don't have to rotate the wheels 90 degrees. When I want to sharpen blades, I roll the dolly, with deck on top, underneath my electric hoist, which is mounted in the garage trusses. This cost me only $40 at a half price sale at Harbor Freight Tools. I run a chain through the mounts for the front anti scalp roller and lift the deck with the hoist until it is upright, then let it tilt over in the other direction about 5 degrees, such that a good two thirds of the weight is on the ground and one third on the hoist. Also, if it came loose, it would fall away from me rather than towards me. I chock the blades with wood blocks and use a 16" crescent wrench to remove the blades. I have to tap the end of the wrench handle with a small sledge to get it going, but that is no sweat. I have an electric impact wrench, but that nut has a huge diameter, and I think handling the crescent and sledge are actually easier than bracing for the sudden high torque on the impact wrench. I clamp the blades in a bench vice and sharpen freehand with an angle grinder which cost about $30 at Harbor Freight. It always pays to use physics and power tools instead of brute force.
If you want to lift the front end of the tractor, and not remove the MMM, you don't need a FEL. Besides, I'm not certain that would give you enough clearance. I have a
BX2200 with FEL and when I do a full lift in front, I just don't see there being enough clearance to crawl under an MMM (which is far back and not lifted as much) and detorque those nuts. It would be much cheaper to go to Harbor Freight and get a hydraulic hand jack, some jack stands, and absolutely those wheel chocks. Still, I would worry about clearance. The BX was not designed with clearance in mind. The gentlemen commenting above are speaking with a B series in mind. That tractor has much more clearance than a BX. What a waste it would be to buy a FEL and then not be able to do what you want. Now jas67 is correct that a FEL is one of the most useful and versatile tools you can have, but if lifting is what you primarily want it for, then insist that the dealer arrange for you to see a BX (with MMM attached) do a FEL lift, place chocks and jack stands, and then crawl under there with an impact wrench (or some drill of similar size) so you can see for yourself what it would be like before you fork out all that money.
My best wishes for success in this endeavor.