So I would like to get the opinion of some experienced investors.My goal is to buy (3) three to four multifamilies.I inherited a 3 family fully paid off and own my current home.Between the two I have roughly 550-600k in home equity.  

I'd underwrite the property, with that low interest rate assumable mortgage, to cash flow positively from day 1 as a long-term rental, but be willing and able to use the rent by the room strategy or to rent out part of the property as a Short Term Rental to dramatically increase cash flow during my occupancy. 

Congrats on your flips and it looks like a lot of equity was created in those photos!

I think I misunderstand DTI for rental incomes.My DTI goes up with a cashflow positive rental ($2000 expense and $3,500 income).

Back then we were getting 1% positive carry e.g.

Left me feeling like a basically have a retail/fulfillment person on my team so I'm a big fan and would recommend giving them a shot, especially if you're in a similar position as I was: Needing to furnish an STR quickly and cost-efficiently. 

I don't know if they still do it but if memory serves a few years ago TD Bank would do a HELOC on a rental in second position but only if it was titled in someone's personal name. 

For context, I will be assuming his VA loan at 5.1% and he will be doing seller financing for the remaining equity and sale price. 

The two existing LTR units (on my family’s property) were built 5–8 years ago at a cost of about $80,000 per unit, so I’m estimating a 20% increase in costs for the new builds.My plan is to use the equity in the land as the down payment for the construction loan, which I expect will make closing costs the primary upfront expense.

So I'm looking at only paying $600 a month to live in a house and build equity!