I see these four rentals providing us a regular stream of income during retirement. 

@Phillip Rosin - Based on the info you provided, I recommend that you start with a Fix to Rent short term loan to purchase the property and rehab it, followed by a cash out refinance into our DSCR loan.

Like painting the old kitchen cabinets vs replacing them, or providing them with a small refrigerator instead of a decent standard size one.

If you want to remote investment and / or turnkey, be sure you vet your providers and management companies thoroughly.

They focus on the property’s income potential rather than your personal income, which is perfect for rentals.Tapping into Equity: Using the $80k in equity from your home could provide a substantial boost to your investment fund.

I've already hired a full-service management team who will provide turn-key management. 

Based on the Opex the seller's agent provided it's $134k which implies the Opex ratio is ~21%.

Your question is impossibly vague as you provide no details.

I think the BRRR strategy would be an excellent option as it provides several positive exit strategies.

In that situation, if the tenant who leaves is the "primary income provider" and doesn't continue helping the tenant who remains, the tenant who stays may not be able to afford living there.