which is an awesome goal but day-to-day attainability is unrealistic.

There's absolutely nothing wrong with using a HELOC or whatever type of exotic loan you can think of if the DEAL is so GOOD that it justifies the actions you take to attain the property.

What would my best option be for attaining financing for this type of situation when I've already got two mortgaged SFRs?  

I too am looking at moving towards the BRRRR strategy, but first im looking into wholesaling some properties to attain the money that will be needed for the 20% downpayment for my first rental property

This way, once we had attained the potential market value (after 8 months of hard work), the bank simply increased the original loan (495k) to the highest amount they had registered (867K).

-Get a non-FHA mortgage, pay the recurring PMI at first- knowing it will (hopefully) go away after I've built up 20-22%+ equity in the property.Assuming consistent PMI costs and interest rates between options (before &/ after refi), the only scenario in which I can see the second option being more beneficial is if I had put enough money down to hit that 20-22% equity level within the first 12 months.This seems implausible due to mortgage payments barely paying off any principle in the first year, not to mention I'd think the only way I could attain that level of equity so quickly is if I had put down 15%-18% initially, which virtually eliminates the benefits of a "low" down payment.I don't have any specific properties, institutions, or rates in mind, and while I'm sure these questions would be more easily answered on a case-by-case basis, what are some considerations I may be overlooking?

Be honest with yourself about your goals and how you want to attain them.

Getting 1% rent seems easily attainable, and there appear to be flip opportunities.

So at the end of it all we had to leave $18,000 in both deals (combined) but we had attained about $54,000 in equity and the properties cash flow about $100 each a month (plus more for self-management).I love BP, just love this place.

I noticed that Experian.com offers a service to landlords where they can attain a 'tenant check' using just the tenant's name and email.