How does this play out, typically?

The question is just how beneficial it'll be based on the property and your specific circumstances.

I am not a QI soliciting business, but have had customer experiences with all of the big ones out there.DM me if you want my perspective.One of my very best experiences has been with a QI based on Florida.

Prices have skyrocketed in my area and based off comps, I believe my prop would appraise for around $700k.

I've never taken it, for instance. 

If the goal is to "just get it done," and there are residential realtors involved that think closing in 21 days matters (in the SFR world, it does), then this honestly may be the best route.A true commercial loan will have an interest rate on-par with a 30YF primary residence SFR rate, but rather than being a 30YF, it'll be fixed for 5-7 years, and then you have to pay the mortgage off entirely, most commonly by refinancing. 30 year amortization may still be in play.

Our current focus is working on 1-4 unit fix and flips, but eventually work towards being able to refinance properties and keep and cash flow them.My question is  tailored on the the way I should structure our relationship for the legal and tax base purposes.Should I secure the deals under my business and pay my partner out of my business operating account?

As Melanie noted, true CAM costs (but really NNNs) are billed based on actuals.  

If I want to play it safe and run my numbers through a DNC scrubber, then its going to cost me around $125 to $140 a month.

You can build credit based on how your parents use the card.