It will either be one of the best or worst decisions of your life. I see no middle ground here. Either you get to fvck one or more of them, or as otheras have said, they get annoyed by you and you're out on your azz again looking for a place. The question is, will your family take you back if you get kicked out?
If I was in your position, a single young guy who has nothing at home he wants to stay for and his whole life ahead of him.. I'd do it in a heartbeat. But one thing, I would make a plan B and even a plan C in case it doesn't work out.
You need to find a stable job quick, anything that will allow you to find your own place at a moment's notice. After helping them out with rent each month, I'd save everything else for the potential rainy day.
Emotionally, you need to make sure you can handle any situation that arises before you do this. Be prepared to get kicked out or walk away. Know your intentions toward each women, specifically, before you move in. Try to guage theirs as well so you aren't 'suprised'.
For instance from what you've posted,
I think the mom wants to fvck you.
That being said, go getem tiger and get as much as you can out of it
