Utilizing Seth's local market expertise, we quickly assessed the property's potential.

Expecting a 4 months turn around to put back on the market in Early September. 

If you are planning on buying it with a smaller down payment, that will also increase your mortgage costs as you are borrowing more and also need mortgage insurance.The price of the home (from the seller's perspective) is based on market value and condition, not on whether or not it matches the 1% rule.   

Charleston is such a great market.

Considering their LTV is at market or debatably below market (depending on the asset), if the interest rate or loan terms aren't advantageous, I'd also suggest getting quotes from other lenders.Since you are located in upstate NY, I'd look for local banks.

We already have a small portfolio, 3 doors, in Omaha, NE where we live, but the market here has gotten too competitive/overpriced.

I just closed on a 23 unit mobile home park, almost all lot rentals.

Specifically, I would appreciate recommendations on the following:What courses, certifications, or degrees should I pursue to gain a strong understanding of the real estate market?

And how do I find solid data to compare properties and figure out expenses in a new market?

My thought is I buy a multi-fam (off market preferably) and house hack for 2 years then move south.