I have found 2 properties in my area that would be great for BRRRR but I only qualify for an FHA loan.

For example, I only ever care about cash flow. 

It may drag between 0 and -$250 in negative cash flow but we want the option to move back as well as it's in a high rent area so if we can see it through to payoff (we are long term holders) it's a cash cow in retirement and it'll be paid off in our fifties.Here's the plan we've been hatching:1. use an 80/10/10 to buy an SFR in Colorado as new primary residence - keeping an eye on the 1% rule but knowing that this won't be a rental for at least 2 years, the reason we wouldn't be putting more down is houses are in the $350-450k range and we want to reserve enough cash to stay on track for #2 below. the piggyback would let us avoid PMI but also pay off the balance at our leisure with the added bonus of keeping a HELOC open as well. 2.

Personally I think the trend is towards negative interest rates (look at every other countries trends) which would indicate deflationary pressure but you can make make a very strong argument for either or! 

Maybe it was fueled by jealousy but I got the feeling that many of them judged me negatively for pursuing side hustles and real estate deals. 

I only recently started but so far I haven’t found a downside to this strategy.

No one else here will be harmed by whatever you decide; good or bad.Don't take the decision lightly, but also don't just listen to the negative comments either.

What if I only rent out one side?

I only know these things from having to learn them myself.

Lots of younger people moving in but so many older people dying that it makes the overall population growth negative.