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I tend to agree that you've drifted out of the 501(c)(4) qualifications. The restricting of the parking lot and the facilities seem to be out of line. The change from "adult only" to "55+" and fining individual homeowners do not seem to be in violation of the conditions.
You might qualify as a section 528 nonprofit, which, in effect, allows you to separate your exempt functions from your non-exempt functions.