This isn't necessarily from the US system, but I've known people from attempted communes. They often fall into a problem of turning into cults.
Internal security is often a bad problem too, like you said you wanted to provide resources for survivors of childhood abuse, but communes aren't immune to that issue if children are involved. You need tight internal security in order to prevent abuse from occurring, especially because people can build up dependencies inside of communes.
But yeah, out of the three people I've known who were in communes, all three turned into cults and that doesn't seem to be an anecdotal issue from stuff I've read. I guess there's just something about the conditions right now that lend themselves towards cult formation when you've got a bunch of people who deliberately cut themselves off from society. You have to get people to believe in something greater than themselves and come together to do real things together, real and difficult things, like actual work of building houses, doing agriculture, waste management. Actual jobs without the normal western capitalist promise of money or security. You're telling people they're starting from the absolute bottom of society, and will possibly stay there as long as they live there. And so you're going to attract either weirdos or people interested in some project the commune is doing, like I don't know, solar power or some type of bean cultivation.
I know it's not scientific or precise to say communes attract weirdos that are more prone to become cultists, but that's been my primary experience with them. It's hard to get people corralled and cooperating unless they've got a good reason to be there, or at least a reason they can believe in.
Also, people who have serious disabilities or medical issues that require dependency on the capitalist healthcare system? They're by default not going to be interested in commune living.