Make sure you work with an accountant specializing in real estate taxation come tax time. 

Any advice on loans or anything would be truly appreciated.  1) Find a way to increase your income, whether that's working more hours or learning a new skill and starting a side hustle.

My measurements should checks out fine (credit, Income/Debt ratio, etc.). 

Whatever rent income/expense we receive/incur, is it split the same % as well?

A bank, or credit union, or anyone issuing a mortgage, can earn 5% interest from treasury bonds, or a money market account.

If your certain you are doing this I would recommend just doing a cash out on your properties, around mid 7's.. having the funds available and put them into a savings account earning 4-5%..

The survey didn’t account for higher rent, lower vacancy and higher quality tenants.

Your equity is not a savings account from which you can withdraw whatever you want.

Coach Carson talks about the small but mighty investor and how you're way ahead of non-RE investors with a few solid appreciating properties3) If you haven't done this already put your money into high yield savings account so your cash reserves can grow 4 to 5% not a regular savings account earning 0.1% interest. 

please do note fannie mae doesn't allow excess rent income more than DSCR 1.0 for primary house so you can't offset excess income for next primary or to reduce DTI so if you can plan it ahead carefully this could be the most profitable approach with the least risk possible.