This particular property that I looked at is managed by a PM company and it has bad reviews especially for cleanliness.

I dont care who pays it or how... if its not paid in full, they get evicted.

Their strategy focused on targeting traveling nurses, a niche market with reliable demand.As for repeating the process in the same city, it's doable but requires careful planning.

Who cares?

And if they are a hobbyist/part-time builder, then they should engage the proper professionals, i.e. a title officer, civil engineer, architect, contractor et al to assist in reviewing the project's feasibility.

I haven't done a HELOC recently, but when I did, they didn't care about the W2 since I already owned the home.

Full application review is almost more important than lease review, as you are seeing.  

Usually, tenants are receptive to the idea but I also wonder if tenants with a higher credit score care less about this feature than ones with a lower credit score who are actively working to rebuild their credit?

Be careful of the snakes in the grass.

Did they require you blueprints and plans be reviewed and made to conform to their standards?