wx isn't much of a prob in INV. I will be lucky to do 15 instrument approaches a year into INV and most of them are because its dark and I can't cancel IFR.
HOTAC consits of a local BnB which is 15 quid a night if you get the none tourist season.
Don't really know the instructors but they seem ok.
Its a cracking place to learn even after 900 hours instructing in the area i never got bored of looking out the window. Which i frequently do after 10 mins anywhere south of polehill.