Funding of America, velocity mortgage type funding?

[Account Closed]

I had some questions in regards to companies such as the above two that lend on the properties cash flow. Will these companies work with first time property owners (with analyst experience underwriting real estate investments and a licensed Realtor). Also most importantly do they actually check for a reserve (in case roof needs to be replaced, etc.) if so does anyone know the rough guidelines? I assume a 100k+ line of credit cards could not work in lieu of cash reserves.  

Very high credit score near 800 but self employed from various sources and will not qualify for any conventional lending. Relatively low income around 40k. Interested in doing buy and hold 4 flats. 

Can these type of loans be refinanced after stabilization? It is unclear on their sites. I see on velocity it states something vague like assumption depends on lender.  

The rates with these are 6-8% so I assume the qualification guidelines must be lower. Are there commercial loans in the 5% I could also get now? Maybe if I brought on an outside investor for that. 

Thank you bigger pockets community for all responses!