We have followed the BRRRR method throughout, and always refi'd into the 30-year FNMA/FHLMC backed products; always in separate names to allow my wife and me to maximize that cheap money (you can each do 10 loans). 

Every market and product type has a market cap rate.  

The Village had a very productive conversation yesterday and it sounds like they are not interested in putting in too many restrictions but it's going to be open for public comment next month.

There are plenty of low down payment loan products that will typically have a higher interest rate with them.If the numbers still make sense, the higher rates are worth the leverage of using less of your cash. 

@Trent Torzewski ours is very profitable, but I think it depends on your product and how much time you spend optimizing your listing.

There may even be some other products that your lender will have that is considered conventional, but certainly there will be some options for you! 

Don't forget to Kaizen your own products. 

Make sure you check out all that this site has to offer.There are some pretty nice discounts on many products and services offered as Perks to BP members that you might want to check out: https://www.biggerpockets.com/perks/proI really like the alerts feature that can quickly guide you to current topics that may be of interest: http://www.biggerpockets.com/alerts

I would advise talking to a lender and finding the best product for your situation.

There is a youtube video for everything you can imagine.