My method has always been to call every listing that hit 90 days on market in areas that I want to buy.

There are many who will argue my methods and that's fine, it's worked very well for me and has been extremely rewarding in ways that cannot be compensated monetarily. 

My experience with friends/some clients is get their numbers via whatever method you can and reach out via the phone.

In your thread, you are worried about short-term KPIs like monthly cash flow, yet you purchased the properties to follow the BRRRR method. 

They have a total of 2 posts both defending the subject company, guru, method, etc.4.

But why would that make them want to use this financing method?

Used houses in the area sell anywhere from $75-125 a square foot.These are long term rentals that I do not plan to sell.I am reading the Rental Property Investing book and implementing the method that focuses on cash flow and that strategy states you need to have $300 cash flow per month, per property.

Obviously the numbers and location would determine which is the best option for me but these would be my preferred methods. 

You definitely want to use a thorough screening method like rentprep.com that gets their income, credit, background check, and call at least 3 references (make sure to verify them by address/job and then their name).  

If raising all cash would be my primary method for funding these apartment deals, what would be your guys contingency in order from most preferred to least preferred.