I could posibly see having a second for the STR vs LTR and keeping STR in one over the other. one asset for one LLC really only applies to commercial not single family

mi Wouter love to join that group if posible please. 

yes, @Erwin Groenendijk:, I think banks are not as easy to convince for these sort of operations for individuals, but I want to explore all options like using partners (individuals that could and are willing to apply for mortgages) and other posibilities but using my company or creating one is not out of my options.I am not sure there is any current meet ups in Madrid, I have searched and not found much, I will keep searching... good to hear in Barcelona you have monthly meet ups.

Sure it carries his name and he claims it to be his Book just like a lot of things that carries his name which he has no ownership interest.That which most think is not posible might be possible in real estate investing.  

You may also reserach your local building department that for addressing posible grandfathered in clauses or conditions. 

Would love to link up or maybe chat with you if posible.

Is it posible to finance it in my situation?

I even explored the posibility of selling a kidney.Be carful most new investors fail not because they can not buy the property they fail because they do not have the cash reserves to carry the property.

The KEY here is to imagine every posible contingency and take that into consideration BEFORE you jump in.

Is there a posibility that perhaps one or more of the seasoned investors were to write an article on how to do a Lease Option transaction....outlining all the steps from beginning to end?