I need to run 10/2 the length of my house, which means drilling holes in
about 50 joints and avoiding heating ducts. It would be so much nicer just
to fasten the cable to the bottom of the joists. Can that be done with
10/2MC?
I've never used MC before; anything difficult about it?

I know (or at least I think I know) that it can be done with 8/2 so that
might be worthwhile if 10/2BC isn't okay. Is there such a thing as 8/2
aluminum?

Thanks