Your best bet is to shadow a flipper for a time and then offer your services as a partner or stake partner.

That will do very little if its a wood framed structure. your better bet would be to insulate between the floor joists from below and replacing the drywall downstairs with a special acoustical drywall, but even then it will provide some assistance but be very expensive. 

Overall, however, I think that a bet on multi-families is inherently a bet against the American consumer. 

Report: Green Dot, a prepaid debit card pioneer betting on digital banking, moving HQ to Austin from CaliforniaAnother HQ relocation to Austin, TX.  

Even without credit checks, we have to evict one tenant about every 3 years and I will bet that our average number of evictions is no worse that landlords who spend a massive amount of time doing credit and background checks.On the darker side, I think I personally rented to every tenant that had to be evicted because I am a bad judge of people.

It makes it safer, but not foolproof.

What's my best bet for securing the financing to a) do the builds and b) hold on to them long term?  

I would bet you a steak dinner at the Brown Palace that you will not find a 70% deal in Denver on the MLS.

The APOD is a form developed by CCIM to standardize the investment analysis of real estate investments.I'm willing to bet you that if you're acquiring SFR for 205K, you WILL NOT be cash flowing, your COC will be negative. 

Apart from the laziness/obnoxiousness of these posts, I'd bet that 99% of those folks never wind up actually doing anything other than wasting the time of whoever they "interview."