Grandfathering is not Missouri specific – these same arguments hold true in all 50 states (except there are no mobile home parks in Hawaii). In 20 years, we have never lost a case, nor had a city stop us from bringing in homes into our lots, regardless of what they tell us on the front end. I don’t know what else I can tell you. That being said, the reason we have always won is that we do great due diligence and get a Certificate of Zoning from the city, a printed record of any violations, talk at length with the city managers and inspections department to make sure there are no problems, and keep a good municipal lawyer at the ready in case anything should ever pop up. Parks that have no valid operating permit, or were not built in conformance with the prevailing laws of the time, have no protection under grandfathering, and you’d be surprised how many of those are out there.The point is that when Bubba the inspector tells you “you can’t bring any trailers into this here park” don’t accept that as fact and drop the deal. And when the city says “you can’t use those three lots because they haven’t had a home on them in a decade and don’t meet our new setback law we passed last week” after you buy the park, don’t accept that as fact and let the lots sit vacant. Mobile home park owners have very solid rights under grandfathered use, and a simple call or letter from a good municipal lawyer is often all it takes to get what you want – and what is legally yours to begin with.