anyone have experience with these small houses? i have a promise to purchase accepted on one in my area (sherbrooke), i'll probably rent it out but might live in it also. anything to watch out for?

strawberry box houses:

https://en.wikipedia.org/wiki/...

the place i'm getting:

https://www.centris.ca/en/hous...

any ideas for small improvements that could boost the value of these types of homes? i saw some owners in the area installed metal roofs.

thanks