Personally see these laws sweeping the nation.. 

I don't have a solution but I think a real estate attorney or a title attorney would be a good person to talk to.

Single family homes are exempt from rent control everywhere in the state.  

In 2021 there were two competing ballot measures that the citizens of Denver voted on - one measure from open-space advocates that would continue to prevent WIP from developing this parcel, the second measure sponsored by the WIP themselves that would exempt the property from the current zoning restrictions. 

All companies must apply unless you meet a certain exemption.

What I personally do is link the working entities with my holding which is also based in Spain.

I would get with the city asap and find out all the details on this.It could be possible that if the LLC changes hands that it loses it's exemption.

You're feeding 2 dogs with one biscuit by taking care of your living expenses and generating rental income at the same time, and by living in the house and keeping it to 4, you generally get exemptions on things that might bother you to live with (IE you can choose whomever you want as your tenants without running afoul of fair housing laws).

Here is an article from Wolters Kluwer that covers the entities exempt from reporting.

-based LLCs, corporations, and similar entities are required to file unless exempt.