is the building and space such that you can easily plug a similar user in the space and be off and running? 

Quote from @Stuart Tollison: Is it true that seller concessions can only be used toward closing costs and interest rate pay down?

No credit can be worse than bad credit - you are like a blank sheet of paper.

Can I reject the offer and ask tenant to move out?

But not great for BRRRRs.Where is an area within 2 hours from Manhattan where I can find a BRRRR? 

Quote from @Gregory Schwartz: Every builder I see is throwing everything at buyers to get homes sold — rate buydowns into the 4’s, appliance packages, closing costs, you name it.I know this is happening across the country, but how long can builders sustain this model?

What you're describing can definitely be done, and you're on the right track with profit-participating loans or JV-style revenue-sharing agreements.

You can find, analyze, and market to homeowners all from this one platform.

What are some ways I can do this? 

You can learn a lot her about wholesaling for free and we have a wholesaling specific forum.