Carol B, there is someone who joined the forum a few months ago who is a big advocate of shared housing, or co-housing, which is, I believe the official term for what you're talking about. She doesn't post often, and I can't remember her name.

But there are more and more women who want to look into this, so I'd suggest you do some online research under the topic "co-housing" to see what you can find.

Then if you still like the idea, I'd agree with Mountain Ash that you should try to pull together a group of like-minded women in your area, to pull together a plan. Let us know how it goes!

There are some legalities you need to be aware of in co-buying a home. Here's an article from the legal site that talks a bit about it.
Boomer in Chief of Boomer Women Speak and the National Association of Baby Boomer Women.