If you do this, then you're going to have to lay down a very strict policy on who you let move in with you. I've done house shares before. The first was great. The second: A NIGHTMARE. I'm actually moving out tomorrow. Maybe if it's your house, it would be different, since you'd have more control over who is living there and what the rules are and such. But please, if you do this, be careful. Sharing a house with other people that are not family can be...well, it can get pretty ugly.
With that said, I think you should move out because that will bring you happiness in addition to independence. You said you've been to college, did you live away from home during those years? Or have you always lived at home? Living on your own is SO liberating. You can come and go as you please, you can be away for days at a time without having to answer to anyone (assuming you haven't any pets), you can walk around stark naked if you want. I love the feeling of freedom. I miss my mother (but I've moved to a completely different country), but living on your own or with a significant other REALLY beats living with your parents.
I get what you mean about wanting to hang on to the comfort of having someone pay your way. But freedom, ironically, has never been free at all. It's worth the costs, though. Also, don't worry about your collection scaring women off. What you said in this thread is right. If they get scared off by your collection, they aren't worth your time. My husband had zero figures when we met. He's got...well, one or two now haha. But he loves looking at mine out on display. They are fun.
So all in all, I'd say, don't stop collecting and don't let people make you feel bad about collecting. Just make sure your hobby stays as a hobby, not an obsession or addiction. If you MUST get a figure every now and again, why not expand your collection and break into the six inch scale figures? NECA and McFarlane make great collectibles, and they are much cheaper than Hot Toys.