I'm sorry you got a dose of it.I'm probably more prepared now that when I was young.

A little background. 30 years young, credit score of 730, no debt, I have my CA real estate license but haven’t worked under a broker for a few years.

I know financing is different from standard residential units however I'm not sure exactly what I should prepare for. 

Even if you got a HELOC off your primary I'd only look for BRRR investments that way you're paying that credit back quickly.    

As long as I have the money, good credit, and job history getting the loan shouldn't be an issue.

I have considered any and every expense associated with the project, including credit card/paypal fee's, credit card interest payments, travel expenses.

Can anyone recommend low cost low rate options for credit cards ?

In 2015 we went through a personal tragedy and we were forced to use credit cards to deal with it.

If you need to sell, consider offering the tenants some money to leave or be prepared to sell for less money.

The will ask for your last two years tax returns, W-2's, most recent pay stubs and two months bank statements as well as statements of other assets you may own, as well as your credit score.