Femurs or Tibia with precise I'd recommend a handicap accessible accommodation. You'll be able to use sink while in the wheelchair since it's lower than normal height. When transferring to toilet some people manage to/from their wheelchair. I used walker and always was deweighting to be within weight limits on nails. Takes a little practice and sliders under the front legs of walker. I did femurs but same concept with Tibia. Honestly I got the hang of it very quickly. Issue is everything takes longer to do and most people lack/lose patience and push the limits more and more. That's where precise patients get into trouble femurs or Tibia. It takes a lot of mental discipline. Bent nails usually occur because a patient got lazy, sloppy or lacked mental discipline rather than an unavoidable fall or accident. Height Journey has a great precise tibias journal, blog, and YouTube with lots of content you might find useful.
I share your fear of bone right next to skin. When I was at Paley saw a tibia guy wear soccer shin guards. He explained to me you'll only have to get bumped once at the osteotomy site and you'll get something to shield them... That in theory applies to weight bearing nail tibias LL too. I want to go back and do my Tibia LL and I don't fear the lack of weight bearing but I do dread it lol. However, sounds like 2025 before stryde 2.0 comes out so feels like too long to wait