Tax liens in Florida are great because there is a sort of guarantee return made by the state.

In other words, the incentive structure breeds a sort of tenacity and grit.

This coming from someone that has 30+ LLCs (but for larger multifamily. 

My small studio and one bedroom properties get a much better return than the larger properties (and are so much easier to manage!)

I did a quick search and found that Dallas has requirements for landlords to provide some sort of cooling for tenants. 

But my parks are much larger and I am charging $50 a month to each tenant to offset that cost..

My sort of vision, or goal, would be to own multiple rental properties so I can inherit passive income from them.

I like the small price point with upside versus larger projects for multifamily.

In this case, the first lien will be held by the investor supplying the acquisition funds -- so what sort of security could I offer the investor(s) who would be willing to provide the $100K rehab funds?

These are basically deeds that state who the property will pass to upon the death of the owner.But in answering your question when there's a spouse living in the subject property (they may have held title as Joint Tenants) re-check the Notice of Petition and if there are other heirs/beneficiary's send your letter to them regarding the property.It's sort of like going through the back door if you will.