Can anyone suggest training videos, books, or other resources that would help educate me on the topic?

My main concern is GETTING financing for it since we have a high debt to income ratio. 

Any way around paying the very high property tax, school tax etc. in SC?  

Is NOTHING sells for a refi appraisal price  I  mean nothing that appraisal is always high.. so when folks say hey I got a refi and it appraised at this and I now have this much equity that is also not true and wishful thinking..

Be sure to take high-quality photos, and if possible, request utility records that confirm separate billing for four units.

But 1k a month in utilities definitely seems high.

@Maegan Quaife, Of the 4 prongs of the Internal Rate of return 2 of them are very high for you - cash flow and amortization of the loan. 

.: Quote from @Tim Delaney: That seems odd to me assuming you aren’t in a highly negative cash flow situation.

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However, if you have the time and prefer to source properties on your own, I would highly recommend the following strategies:Connect with probate attorneysVisit property auctions: These happen monthly and, surprisingly, aren’t saturated with investors.Cold callingTarget LLC owned properties: Over the years we have seen an influx of companies purchasing SF for rentals/long-term holds and they failed to account for property taxes and an increase in new construction coming to the market.