@AbandonedAmerica Well I think you are right that just letting a bunch of people move into an abandoned place and start a bunch of DIY repairs might not always work out that well.
For this to work would take a bit of organization, to make sure essential safety things, and basics like making sure the roof didn't leak, got taken care of first.
And unfortunately you would probably have to have some minimum standards of conduct and workload, and be willing to kick people out.
But these are all challenges, not insurmountable obstacles.