if it is "mounted" outside, it will need to be
insulated -- mainy to keep from irritating neighbors...
as the sound is bothersome..even from the quite ones...
and also the fumes need to be vented...

it does sound like a huge house..

if the water pipes do not stay warm (above freezing)
you will have other problems,,easy to solve with
gravity flow h20-just leave it running to prevent freeze.

not so practical when water costs $

they do make an anti freeze that is non toxic for
cabins, r.v. and other pipes to protect in winter.