as a wholesaler after assigning contract to end buyer with existing mortgage and they take over, would it be reccomeded if i tell the end buyer about creative financing to another potential buyer

And that's not a sarcastic question, possible answers include but are not limited to...If management/ownership has been lazy and there's a lot of vacancy or below market units, that you can rent out and/or bring up to current market, then maybe you offer a little bit more for that upside potential. 

Viability: Is this type of project worth investing in, considering the potential returns and risks associated?

@Dominique Colas This post looks a bit stale but are you still in the market for potential rental arbitrage properties?

And this property has SERIOUS value-add potential.

You're correct about the potential misalignment in my listing's target audience and its tone.

Not sure about crime and the appreciation potential. 

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provides support for the property tax appeals process.Additionally, it can help maximize renovations and improvements.A Cost Segregation study is an IRS approved federal income tax tool that increases near term cash flow by utilizing shorter recovery periods for depreciation to accelerate return on investment.

I have a few potential prospects.

You will need, or should have, an existing reserve of funds to service this potential rental.