Kieran, the best bet here is to refinance with a DSCR loan.

Unless it’s specified by your loan type or lender, you don’t have to.

The typical term of this loan is 12 months and rates range from 10%-12%.

If you don't/won't have WiFi then you should either consider a SimpliSafe system that you can move around from house to house, or some type of Trail cameras like hunters use for identifying game areas.

Or, as Travis mentioned, sell your primary residence and explore house hacking opportunities, which will allow you to snowball income savings to deploy into the next deal. 

We then purchased 2 houses for investment purposes.

And addressing my item #1 comment, almost always, when a "distressed" homeowner is approached, they initially are grateful to have the loan brought current, but before long they forget the circumstances they were in and you become the bad guy that stole their house.

The most successful loans are those that do not procrastinate and get the appraisers In ASAP so you can get over any unexpected bump in the underwriting process.

I just did this with a 4/3 new build out in Cape Coral and a construction to perm loan through the bank.

Bridge loan.