Check with your municipality about how property taxes will change when you buy the place.

A rent payment isn't enough to cover the DSCR payment, HELOC payment, tax, insurance, and maintenance.

401K loan is capped at 50K and with withdrawal, you have 10% penalty and tax implications.

You have to understand that these people don't care about anything, and the government people are overworked and will not follow up with all the small cases. 

I had to redo everything they did on my taxes. 

Without an ITIN/SSN, I'd be worried about running into KYC/AML violations, fed tax liens, the borrower being deported, lien enforcement, etc.

I've been using the GE  GFW148SSMWW // GFT14ESSMWW models which comes to $1,650+ tax for units and stacking kit. 

To transition to multi-family properties, research landlord-friendly states like Texas, Florida, Tennessee, and Indiana with favorable eviction laws, lower taxes, and higher rental demand.

Overall, the tax benefits and appreciation alone keep me interested in staying with it more than the cash flow itself. 

This is obviously much better than $1,400 per month.On top of that, you will now get 2x the depreciation write-off so your taxes should go down.On top of that, you will now get 2x the appreciation when real estate price go up.On top of that, your tenants are helping you pay down the loan, initially at about $100/mo for both properties, which gradually gets better and better.On top of that, you now have more units so if one or two goes vacant, you have more renters covering the losses of the vacant units.If you want to keep these properties, I would do a cash-out refi and go buy more rental real estate.