Consult with competent legal counsel to guide you regardless of your choice here.

If you are hiring a legal licensed contractor , he will provide you with a contract . 

Clear financial separation ensures all rental expenses are deductible, maintains legal protections, and simplifies tax compliance.This post does not create a CPA-Client relationship.

For legal, we can provide you a list of attorneys out there who do this and my recommendation is to interview them to see which one you feel works best for you.

@Kash Tacke legally, you would need architect drawings to get approval from Detroit Zoning Board.

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.

All existing STRs with 2 days rented in the last year will be granted legal non-conforming status.  

In case someone has been successful please share the methodology that is legally approved.thanks,Ananth

To attract investors, offer incentives like high cash flow potential and tax benefits, and structure the deal with clear legal terms and contingencies to minimize risk.Good luck!

If you need financial help, ask under the "Finance, Tax, and Legal" forum.