Do you use the historical selling prices to inform your offer?

We made an offer (which was accepted) and ordered a home inspection.

There are lenders around the country offering those products.

Right now I am on the middle of a flip no more cash in hand to make an offer so my only option seems to be investors or a HELOC against my flip or my own house.

We offered $75k under asking and they accepted. 

@Nathan Frost typical for Detroit, that's why we offer our clients several security options, including removing & storing mechanicals when vacant and then reinstalling day tenant moves in.What makes you think the seller will install new mechanicals?

In short, if you’re comfortable relocating one of the sides to move in, and comfortable to live in the place, than just do it.

Keep in mind that these homes are sold "as-is," so a thorough inspection is crucial to identify any potential issues that could affect your renovation budget and timeline.Special Requirements:Freddie Mac has a "First Look Initiative," which gives owner-occupant buyers an exclusive opportunity to purchase homes before investors can submit offers.

A better approach is to network with other experienced passive investors and review the offering together. 

Again PMI offers the lower rate because its less risky and offers insurance to the bank.So when you sell your current home try and keep as much as possible and avoid an "All Cash" offer.