That mortgage will tie up your credit and your VA entitlement, impacting your ability to purchase other property.

Leverage Lines of Credit: Some people tap into personal or business lines of credit to cover the EMD.

I assume this is deal one but as long as they have good credit they can get entry level bridge loan terms. 

For instance, DSCR loan interest rates are determined by LTV and credit score, functioning much like coordinates on a graph (think X any Y axis).

Find out what you qualify for from a loan officer or credit union. 

Any potential buyer with an IQ above 50 will insist that these are replaced or they are given a credit. 

I have occasionally provided a rent credit for a good tenant to help them with the purchase of a lawn mower or weed wacker.

You can usually also benefit more by simply using the seller or builder credit to do a simple "Rate buydown".The first rate on the buydown is a "teaser" rate that only last for a short time 1 year for example but a true rate buy down is for the entire term. 

I'm using Quickbooks to track overall finances.

@Henry BaghYou can start with local lenders and local banks and even credit unions some have DSCR options.