As always, it is not intent, it is interpretation that leads to a complaint. Here is an exert from Hud.gov Library on using human models in advertising:
" Selective use of human models when conducting an advertising campaign.-- Selective
advertising may involve an advertising campaign using human models primarily in media that cater
to one racial or national origin segment of the population without a complementary advertising
campaign that is directed at other groups. Another example may involve use of racially mixed
models by a developer to advertise one development and not others. Similar care must be
exercised in advertising in publications or other media directed at one particular sex, or at persons
without children. Such selective advertising may involve the use of human models of members of
only one sex, or of adults only, in displays, photographs or drawings to indicate preferences for one
sex or the other, or for adults to the exclusion of children. "
So unless you are sure your human models represent sex, familial status, color, race and sexual orientation in your advertising and it would not be misinterpreted by someone looking to move to your community, go for it. I do not have that much faith in people's interpretations and it only takes one to file a complaint.
I would take the safe route, personally. No people pics.