The house Mom is planning to go see soon (not yet visually inspected in person) has a little more detail from a realtor.
Aluminum siding. Appears in good shape, just needs washing. I take it that the stuff will be hot in summer and cold in winter, but fairly durable at least.
Loose floorboards. No better description except the house is habitable right now, so I take it not too radical. Any guesses on what to anticipate there or causes to look for that might mean trouble later? (Omit termites, got that info covered for Mom).
My guesses at this stage is the house wasnt heated this past winter (empty, slow market) and dampness from the crawlspace underneath may have built up enough for a little warpage. Treatment if so seems to dehumidify, possibly add insulation under floor in crawlsace with vapor barrier, let settle, then re-nail what needs re-nailing. If any are seriously warped, replace.
Any other ideas?