1. If you have no idea what Airbnb is, which many people do not, then you have no idea what to do at the site and you'll probably leave.
2. I know what Airbnb is and still could not figure out Housefed was until I read your post here.
It sounds like a fun business. I think you should be more explicit on the front page as to what exactly it is. I would definitely try this out if there was a host near me.