Hey @Hans Alverson this is something we do quite a bit of so Id be happy to share what I know. This post could get very long though so I'll just keep the most important stuff in this thread.
First and foremost, this is very delicate stuff legally. Anytime you share ownership of a property you have two options.
1.) Put each investor on title or
2.) Have an attorney write up a PPM (Private placement memorandum).
Unfortunately you can't really put more than a couple people on title so you're probably going to have to go with the PPM route if you're going to raise capital from lots of friends and family. What you're trying to do is technically a "security" by definition of the SEC and they regulate it. Attorney's usually charge anywhere from $20-50K to write up a PPM. If you try to sell percentages or shares of the property without this you could go to jail. I know that sounds harsh but securities law is the only kind of law that does not give you grace for naivety. Meaning if you kill someone by accident your punishment is less severe than if you do it on purpose but that is not the case with securities law.
I hate to tell people this because its such a buzz kill but I can tell you it IS possible if you do it right. You just need to think big in order to make the legal costs worth it. Let me know if you have more questions about this route.
The other option is to do like mentioned above and offer some kind of loan. That avoids the whole securities issue.