With that said, the greatest challenge is the stigma of a trailer park. The local community NIMBYs fight hard to not permit new communities from being established (speaking as someone who optioned a parcel of land in central Florida for this purpose and had to go plead the case at planning meetings), and existing ones are getting snapped up by private equity and real estate investors to turn the financial screws on people who have nowhere else to go.
https://www.npr.org/2022/05/11/1098193173/what-happens-when-...
https://rejournals.com/investors-appetite-for-manufactured-h...
I think this model works as a coop or non profit land trust, where the resident owns the home but the community protects their stake in the lot. Think “A Tiny Home For Good” Tiny Home Park Edition. You need to defend against the Capital vultures.
https://www.atinyhomeforgood.org/
(Tangentially, someone from YC should reach out to the above non profit to have them go through their next non profit accelerator cycle)