Quote from @Catherine Ashmead: Does anyone know of good companies in Arizona that I can contact?

Which state are you looking to make a purchase in? 

Would love to pick your brain a little bit more.

This is the case in a few states. 

I just thought he was busy and didn't have the details, so he hadn't responded.

Although multi-family properties is a term used more in the US and converted itself into a proper investment strategy, this is also possible in Spain (or anywhere in the world).

Hope this helps!

We don't know if he should adjust up or down, because we don't know the details of his rental.

Since you’re focused on buy & hold multiplexes, consider networking with local investors, refining your underwriting skills, and researching markets with strong cash flow and appreciation potential.

Probably better to post in the Buying & Selling Real Estate Forum.Without details, hard to answer the question.