I've been interested for quite a while in investing in Spain (almost doesn't matter where, I love almost everywhere I have visited and lived in the county) As a foreigner, do you have any advice for where I could get started researching if this is possible?

I now spend $5.8k on umbrella policy and $800 on LLC for a total of $6.4k for asset protection (divided across my unit count).  I

Depending on the county the property is in I could recommend you an attorney. 

I looked up the lot minimums for Shelby County, and these seem to be 15,000 square feet with a 100 foot width.

So far, I've been looking specifically to opportunities in Saint Louis city and county and I found out the programs of the LRA and some associations and agencies for the neighborhoods revitalization, but I'm struggling to find the right resources to deeply analyse the local market and trends.

Despite his efforts, our partner has not fulfilled his responsibilities (besides other things, he has to handle county and state dealings, as well as completing the plumbing work. 

only buy a MHP in a city/county that will allow you to bring in new or used mobile homes to fill in vacant lots.

Here's my next step:Since the exact market is still up in the air, I'll need to research the viability of BRRRR in each of the potential locations (Fort Wayne, Twin Cities, Denver, Bucks County, PA, and West Chester, PA).

I owned a mixed use property in Dutchess County.

LTR is also possible with this method.I generally stay in the surrounding counties to get lower value properties.