Thanks! Sorry…let me clarify a bit.
Absolutely, you do not need to use iFrames IF you don’t mind shooting visitors off to a separate page housed on the iHomeFinder site.
My clients requirements include a search tool on the home page as well as the list of featured homes, which is why I was thinking I was forced into iFrames. Right now I’m working on changing their requirements 
By the way, not included in iHomeFinder’s Get Started guide, but arriving in a later email were some tips about using JavaScript widgets…out of curiosity, have you worked with these?