He brought me $500 in bills for leveling spacers and thinset and redguard/crack prevention.

It doesn't provide protection unless you have an Operating Agreement that you actually follow.

Learning from others' experiences and perspectives can provide valuable insights and help you make informed decisions.Have a Plan: Define your investment goals, whether it's building passive income, achieving financial independence, or growing your wealth over time.

I was wondering if there is anything that might prevent me from exchanging it for a rental property like a duplex or a triplex?

I would be happy to connect and provide you with some recourses I use.

Seller has a mortgage that will prevent him from selling at a 6% cap.

Many landlords opt for modest rent decreases or propose multi-year leases with slight increases over the extended term to provide stability for both parties.

They provided me with a great opportunity to begin my first Fix and Flip.

All of those things, unfortunately, increase during a recession, providing a safer base case for self-storage than some other assets.

In fact, if you provide a copy to your family/friends who are interested, you would be showing them that you want full transparency and protections on your transactions and treat their money as if it were you own.