Been doing this a couple of years now, since the COVID quarantine. Don't use gel (Got 2 B Glued). It's not water resistant, so sweat will melt it. You have a choice between using a weaker tape like 1522 to bond, or a tape tackifier like Brandywine/Davlyn Super Stick, or Mastix P Spirit Gum which is intended for theatrical use, or something like Mity Tite which is more like an acrylic wug glue but not as strong. None of these are great options, P Spirit Gum is in some ways the least bad, Mity Tite is probably the strongest.
Yep. For that reason I think you're prob better off with a poly base so that you get more surface area to bond, but I haven't tried this with lace.
Nope.
Removal is not a big deal because the hold is pretty weak, especially by the end of the day.
I'm not cleaning the residue off daily either, more like every 7-10 days. It works as a tackifier when rebonding the next day.
The major upsides are comfort (giving your scalp so many hours to "breathe" per day, especially when you shower and sleep) and not having to style the hair very often, since you're not sleeping on it the style usually remains intact from day to day... which can *extend* the lifespan of the piece.