Parking cash in one's own properties: help me whiteboard it

[Bill Henley]

Our LLC owns seven properties in St. Louis: 1 single, 2 duplexes, four 4-plexes. All have mortgages. We are selling our primary residence, located in California. We will be netting a lot of after-tax money from this sale. (1,200 sq ft 2+1s are currently going for $900K or more.) We want to keep the resulting nest egg liquid. One possible parking place that occurs to me is to pay off some of our St. Louis mortgages. I'm thinking, why chase deals in an uncertain -- and presently way overpriced -- marketplace, when we already own seven proven deals. Where I would like some experienced advice from the BP membership is to ballpark how much it would cost to pull that money back out again, using a Line of Credit or a re-fi? Part two is, how do these costs compare with the risks and rewards of other places to park money, like flips, hard money loans or non-performing notes?

It would be great if someone has already tried this formula -- to park money in one's own properties, then pull it out again when needed -- and could share the experience.