Failure to pay rent is a pretty clear violation of a lease, even in very pro-tenant states, so after the hassle of the lawsuit, a path is clear to make the property owner whole.

Flipping is hard and has a high failure rate even with experienced people.

Accept whoever applies" is an idea that would cost you a bucket of money in the long run.Bankruptcy is usually a "no" unless it appears to be a one-time event caused by something out of their control such as a massive medical bill or a business failure. 

Failure is not the opposite of success, it's part of success.

Plan for those system failures on a spreadsheet. 

I have 2 black belts, one in failure and one in success!

Since you're going for low cost and volume, you'll need to solve the music industry problem of one hit for dozens of failures. 

@George Ramsay , I wouldn't even want to get training from someone that tries to "sell" you into his program by telling you that you if you don't jump on an opportunity immediately before you have time to really think about it means you are a failure. 

So never waste a failure, learn from the no's and how to attack similar conversations or situations differently in the future to give you a better chance at success.

The experience goes with track record - do they have a history of doing this and being successful as well as having failures.