Newbie here, but Aiello just tweeted about the house progress out of the blue... Nothing sticks out as being hints for potential houses/scarezones, but its still really cool to see how far along things are! (Using "starting treatment" in reference to house 7 could be a hint, or maybe I'm just reading into things too much, haha)
https://twitter.com/Michael_Aiello/status/1085699039033782272