Specifically, I'm interested in pursuing a cash-out refinance to leverage the equity in my investment properties.If you know of any reputable financial institutions in the area that cater to investors like myself, I'd greatly appreciate your recommendations! 

I always advise clients to build this arm first. 

I am new to the real estate investing field and am seeking advise between choosing a HELOC/Cash Out refinance loan for funding.My primary home is paid off and valued at approximately 600k.

And these deals do not grow on trees you need to find specific set of circumstances to find them ( talk a seller into it) and have EQUITY enough to exit if you have a problem with the loan .

The reason being I see a lot of people again just looking at one specific number and not understanding everything behind it.

That is marvelous advise.

I am wondering as well- for wholesaling, fix n flips, BRRRR, S/T rentals specifically

None, not a 1 EVER has connected the words "Minneapolis" and "Emerging market" since the late 80's and maybe very early 90's which was in connection to the 80's just more specific trailing opportunities in redevelopment from such. 

Moreover, I would not advise working with multiple agents.

Tax expenses also vary widely by investor, and since NOI is specific to the property, not the person, do not include it.NOI equals all revenue from the property, minus all reasonably necessary operating expenses.