Regardless of how much you read and research it ends up being trail and error....So in my opinion just jump into the deep end, I’d rather be swimming and struggling then watching on the sidelines wishing I was swimming. 

Was it a struggle to pay off her bills each month?  

there are several options, you could do a Non owner occupied Cash Out, on the Secondary Market like Fannie or Freddie, you could take a Line of Credit, some banks may do a HELOC most will not because its a HOME Equity Line of Credit, and because its not your Home most will not, but you could do a Commercial Line of Credit, I have a couple, one is for 3 years the other is 2 years, but dont be surprised if they only offer you a 1 year term to start. you could also cash out on a commercial note, 3 or 5 year term, 20 or 25 year amm, these are pretty easy to get if you or the property have decent income, your biggest struggle will be that you are out of state, so may want to look to banks that are in both your home market and where your property is, like BMO for example, still a smallish bank so somewhat flexible,  yet large enough to be in both markets, good luck

When calling potential sellers and possible future cash buyers I am struggling with the right things to say when they answer the phone.

I’ve got about $500K-$700K in liquid capital that I want to invest (not necessarily in one investment) and build a long term investment path in Charleston but I’m struggling to find the starting point. 

While everyone struggles to find deals I can find a deal a week.

One of the biggest things I’m struggling with is tasing captain to purchase a property .

I paid cash for everything, it was a huge struggle as I did not qualify for financing.

We are struggling trying to wrap our heads around an equitable split where my husband has already put the deal together,  his company will do the rehab/maintenance/management, while the other party provides the downpayment/ financing.  

If you already have an in depth grasp of property values and have a contractor lined up those are two very big pieces of the pie especially considering you sound like you have a grasp on the financing end which is something people struggle with when it comes to BRRRR.