Biggest key is to take the leap and start going after deals.

Usually the biggest complaint about house hacking, is having to move every year or two to continue the strategy.

Airbnb asked Congress to bump that limit up to 60 days.Finally, the company asked the body to encourage lenders to offer low-interest loans to hosts, using tax cuts or other such incentives...”It will be interesting to see what, if any measures are passed to assist property owners.

While it's impossible to offer any guarantees, and any number of things could delay your closing,  if you are that deep into a refi, your lender would likely have no incentive to cancel it in a falling interest rate environment. 

I would either be putting this all on credit or eating into my 6month emergency fund reserve.My biggest question is, from a strictly ROI standpoint would you add the half baths to each unit for $7-8.5k for an extra $100-200/month.

Dollar is currently soaring, everything else getting sold off, so deflation is biggest problem currently.

One point of clarity on your statement about the Opportunity Zone incentive being a tax deferral and not tax free:   It's actually both. 

I think single families and small/starter investor might be the biggest hit!

Unless you want to get in on the Opportunity Zone incentives.

Again biggest thing is how the town is.