I'm curious if others have used this tactic for creative financing as I haven't heard it come up before.

You don't have to have a special negotiating tactic to convince the seller.

I have one for an individual triplex, have an option on another empty lot, and own 3 contiguous properties with multiple lots that can be split or combined for up to a 75 unit/6 story building and in between so it's a tactic of mine to have projects in the queue and be able to hold/do something in a year or two once I clear past the capital gains timing. 

My rehab tactic is I don't care about the age of the HVAC. 

Very tactical question, here. 

I wouldn't be intimidated by her tactics, especially if you're just charging them fairly - which it sounds like you are. 

, and did the tactical work (managed tenants, contractors, ect.) is this generally enough for another investor to bring the capital and be there for guidance to do it together?

You'll find that they attract slightly different audiences, and that varies by location.What's important is that you know you can uses different marketing tactics to attract different audiences.

Ideally I'd like to invest out of state in the future (a state a bit more landlord friendly with a higher ROI) but if I want to make a tactical purchase in Detroit/Metro Detroit where would you suggest... budget $250-270k financed.  

I've used this tactic before to create a digital paper trail and used the excuse, "so I don't forget" or something to that effect.