I can tell from your questions that you are in a bit over your head and before you make an incorrect decision you should STRONGLY consider a consultation with someone.

For example:Second, under their "About us" link, click on "Management" and you'll see a "Meet the Team" page where there's the following photo/info for this James LaPushner fellow you mentioned (which says he was born in New Zealand):However, if you do a reverse Google image search on this photo, you'll find that it's posted on several other sites, including this one: https://planetaseminarov.ru/people/konstantin-baksht.htmlHere's a photo of him from this page:This page is written in Russian, but if you translate it, it says his name is Konstantin Baksht, he lives in Moscow Russia, and he is the owner and CEO of the international consulting company Baksht Consulting Group. 

We can also walk and lose EM (and the money we've put into inspections and PE consultation.)

.• That the grantor/mortgagor was insolvent at the time of the execution of the deed.An estoppel affidavit (executed and acknowledged by the grantor/mortgagor, attesting to the fairness of the transaction, the consideration exchanged, the value of the property, and other factors showing an intention to make a genuine transfer) or a recital (inserted directly in the deed) are supporting documents used to forestall challenges to these transactions.State law and local title standards must be consulted in regard to the consideration and treatment of deeds in lieu of foreclosure.What a GREAT post!   

Have you consulted with lenders to discuss your budget and options?

If you're going to make a lot of changes, I recommend consulting an attorney to ensure you're updated on the laws.

You should consult a lawyer to completely understand your responsibilities and your liabilities as they are magnified when renting room by room.  

This approach allows you to have a legal presence in the country, which is often necessary for investing there if you don’t live in Spain.Having a virtual office in Spain through your LLC could help you access local tax benefits and deductions, such as expenses for mortgage interest, repairs, and insurance, which non-residents typically cannot claim.It’s worth consulting with a tax or legal advisor familiar with both the US and Spanish systems to ensure compliance and take full advantage of this option.

I'd definitely consult an RE attorney who is versed with dealing with these. 

If the signs point to selling, consult your CPA about the tax implications.