. :)  these are not credit score loans ( I mean I have a credit score) but thats just a formality its all about capital and relationships with your bankers and deposit relationships thats key as well.Yes your relationships with sub contractors will be a huge factor in profitability, both direct and indirect. 

We have no debt and good credit scores, do we have any options for making this work?

Plus the challenge with mid term is you are generally on the hook for things like internet, utilities, etc.

All calculations suggest great investment for 4 bed 3 bath in good school zone, however once the tax estimator goes from $2200 to $9500 due to lose of tax credit from not being a primary residence it hard to see how to get property in SC.

Check credit, income, and rental history.

Go wtih what works - but intelligently.We offer a free month of rent, but to avoid desperate people, we credit 50% towards their 2nd month (to make sure they can afford 1st month rent + SD) and then credit the other 50% the 5th month.

As long as the rents can cover both the current PITI and proposed P&I payment, credit is at least 680. you should be able to qualify. 

A business line of credit through your LLC protects personal assets, builds business credit, and may allow interest deductions, but it might be harder to secure for a new LLC.

I've been self-employed for only 6 months, and loans are proving difficult to come by despite my great credit (not to brag, I'm moreso frustrated and seeking help).

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?