RED's NMT 3 story townhouses would give you more residences with less foorprint. save you space on those tight maps.
The best solution is a dedicated and seamless mountain set that cleverly blends with the mountainside.
It would be best if it had all vanilla building types, and a few special mountain only things that fit the theme.
I kind of did it for the dock set. I'd like to do it one day for mountains also.
A bit of my struggle personally is I'm working on new <abbr title="Colonial Charter">CC</abbr> but also some other large banished mods that aren't known publicly so for a while my hands are tied.