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

Personally, I'd cash-out refinance into a 30 or 15 year loan.

I personally hate them and think they are little more dust magnets but will add some if crucial. :) 

Yes, the BRRRR method can work with multifamily properties, and many investors have done it successfully.

If you figure out another method.   

I've been thinking a lot about Florida and I believe it's a great state for future potential investments such as purchasing and renting out (utilizing the BRRRR Method Of Course).

So often i speak with flippers who put too much money on their personal cards and tank their scores.

Definitely a personal preference.

I 100% agree with the intent aspect and that is an important premise, but the fact is in this particular situation intent for it to be personal use has been confirmed (by way of a public post).

The other PM can be a fix-mindset type of person where they are not willing to share anything unless you have a property and are willing to sign a PM agreement in the same conversation.