I would ONLY consider that though if they had a real plan in place to catch up and I would likely verify what they said. 2.

Then I had to call again to verify it was actually canceled.

Whatever numbers someone (wholesaler/agent) gives you, verify those. 

Verify all information and don't be pressured into doing a deal with them.

It doesn't matter how you present something if you don't have verified experience to bank on.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Verifying last 2 years of rental history very important!

It would be even better if we could get it zoned to rent out the house as a 3/2 and separately rent out the ADU as a 1/1.If anyone that sees this has done something like this in Columbus, we would love to get any info on how the process went, how much did the permits and inspections cost, etc.Also, if anyone knows whether or not we could even rent out an ADU through sec-8 that would also be helpful, as we will definitely consider using sec-8 to rent out the property if it can get us higher rents.We are going to be contacting the city's zoning dept right away to verify with them that this would even be allowed at this address, and to try and get a rough estimate of how much permits etc will cost us.

Verify all information and don't be pressured into doing a deal with them.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?