You're going to spend a lot more time executing the purchase transactions and operating a SFH portfolio of 20 than a MFH 20-unit.

Even if it’s only 10% and you learn how to execute deals that’s worth it.  

Hilton is even offering 1 million room nights to essential healthcare staff too.

But if you are not changing tenant's rents when they roll, besides marginal inflationary amounts, I would not expect much.Additionally, you may have a couple that absolutely love the current personnel, and changing the staff may cause a them to want to move, but generally, without some major change, you shouldn't see any turnover.As mentioned, 100% occupancy on any property is unrealistic. 

Once you do this groundwork, you will have greater clarity on your path and what will actually get you there and it will be backed by numbers and a plan rather than subjective responses from the interwebs.As far as BRRRR, I personally love this strategy if executed correctly, and I disagree with George. 

That being said, a lot of service members choose to take leave before executing orders, which shifts the date earlier.

Make a plan you like then execute!

Only in very special circumstances can you have two (2) FHA loans at one time and for the most part, house hacking does not meet the requirements...you will need to be prepared to use conventional financing (or some other form of financing) for your 2nd, 3rd, 4th, etc. purchases.I admire that you are thinking the way you are...If I could go back, the HH strategy is exactly how I would have started...I believe that rental housing, and in particular multifamily investing, are the best routes toward financial freedom...so much so that I have been educating my 19 year olds in every way possible so that they are prepared to execute a HH strategy when they are done with school (maybe even earlier)...I believe you have the right mindset and are the correct path...Best of Luck!   

Nearly threequarters of all apartment properties in the country are owned by “mom-and-pop investors” who manage two to four rental units, These owners are also liable for the mortgage, “utilities, insurance, taxes, and payroll for staff and contractors they employ.”

It is properly screening partners, executing well written contracts and having good insurance.