The problem with that philosophy is this is such a new field, that there really isn't any "reputable" companies out there. They're all brand new. They're all making their names. I'm sure in a few years it will be different but right now that's the current state.
I will admit for me the big part is in lifting it. I live in a three story walk up. I'm only on the second floor so it's not too bad. And we do have bike storage where I live but it's permanently locked from 8pm to 8 am. There is a 1st floor "mud room" I could keep it in, but that is half a floor up also.
TBH the bigger problem is, even if we did have full funding, we just don't have the necessary amount of trained physicians. There would still be a backlog.
If you really like rollerball mice and have the money, the ones I recommend are either the ELECOM Huge Trackball Mouse or the Gameball. The Elecom starts around $100 and the Gameball is around $300 depending where you live.
This one does look interesting.
[edit] Guys, I'm 350 plus pounds. This thing has a 250 watt motor. I would crush this thing.