Contractors all the time either fail to finish or finish in a way that prohibits you in selling and exiting or refinancing at the number you expected and now you have to leave way more in than you thought. 

@Pat Aboukhaled wife & I have thought this would be a great use of failing malls for affordable housing.Unfortunately, as @Greg Scott points out, many people take the path of least resistance, which can ruin the idea.So, you'd want security cameras and maybe even security guards to hold residents accountable. 

For flips, look for distressed properties in areas with strong buyer interest.

These are heavy-hitter, regular buyers.

I'm looking to connect with other wholesalers, real estate agents, and investors who are interested in off-market deals in the $100k -$150k range.My focus is on finding off-market properties for fix & flip or long-term rentalopportunities, and I'm building my buyer's list as I get started.

If the proper reports and documentation are not completed, you run the risk of failing an IRS audit and the cost segregation not being honored.

You failed to perform proper due diligence before closing on the rent house.

This will make it harder to afford, harder to get lending, and ultimately limit the buyer pool which puts negative pressure on prices.  

If you fail to follow the rules, you may open your personal assets to a lawsuit.

I also have a few leasing agents and buyers agents that have my information and get a lot of mid term rentals that way.