They remain in good standing on credit reports. 

One of my challenges might be that I'm still carrying undergrad and business school debt plus some credit card debt, so I'm still determining what financing might look like.

I have to give Watertown credit.

Then whenever a good opportunity arises, you can simply write a check out of your credit line and purchase in cash.

DSCR would be your best bet but again 25% down and a DSCR of 1.25% minimum.Do yourself a favor and do not let just any Lender/loan officer pull your credit just so they can take an application and have a possible deal.

The game is to keep loosening credit to bolster the economy beyond sustainable limits, then quickly contract it.

@John K.Your DTI definitely factors into things, but presuming you have rental income from your houses, that gets to be applied as a credit to offset that debt.  

That and your credit score will be the biggest levers on the rate for the purchase.

My company holds a 100k line of credit and we have another 200k in cash.

If I were you I would make a list of what you’re looking for and start calling the local banks/credit unions.