If you are interested in a similar plan like this that did take over a town and put in their own government, highly suggest watching "wild wild country'. Basically followers of a guru named Rajneesh move to a rural area in Oregon and bring in thousands of followers, they then elect their own mayor and sheriff, not going to say how it ends but an interesting experiment in this type of moving to establish a singular community.
https://en.wikipedia.org/wiki/Wild_Wild_Country