Your specific variable expense assumptions are wrong, BUT you stumbled into them being correct overall.Also, you are approaching this correctly - entering in the numbers to generate a purchase price that meets your metrics:)

Supplement this far simpler entity approach by ensuring you have appropriate types and levels of insurance, you operate your business in a manner in which your conduct is not considered an exclusion in your policy, you work with licensed and insured vendors, you execute contracts with indemnification clauses with these same vendors/ require additional insured status &  maintain appropriate licensing and permits.

If the only MFH options you're finding are in areas you're not comfortable with, it might be worth focusing on a duplex in a better neighborhood.Saving up for a larger property later is a valid approach too, but keep in mind that real estate tends to appreciate over time, and waiting might make it harder to enter the market later.

Need to be sure you include the "unknown budget" and never take the optimistic approach as it is better to have money left at the end than writing more and more checks that were unplanned for.Again, if you can walk through an actual property and compare notes with someone that does it in your area (key factor), you will be way ahead of what a generic book can give you.

I have a buddy that has been doing flips for a few years and he now has investors approach him asking to get in on his flips so he lets them cover the down payment/entry fee's for 30% return on their money.

A lot of universities have students that need mid term housing due to graduation dates, mini semester programs, etc. and I've found if you approach them and offer them a solution to this problem, they are willing to work with you and help send business your way. 

Now, if you listen carefully you will find that he too found some of the same things that others mentioned...no deals in Austin, prices were too high...but then he adjusted his approach and nailed it!

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.

Investors who take a patient, forward-thinking approach can still reap substantial rewards.

As an agent who has worked almost exclusively with investors for years, I almost automatically take the approach of saying “no” first.