I guess, for some reason, I was thinking a bank could simultaneously claim the assets of both parties until the lien was satisfied.

Resist the temptation of focusing on quick cash, wholesale/flipping strategies or at least temper it by simultaneously building long term wealth with rentals when it makes sense to do so, the goal being passive income or mailbox money that you can use for retirement, children's college education, etc. 

, which I'm convinced more and more that it would be a worthwhile endeavor to keep it and make it work for me to buy another property, what would be my options as far as borrowing against it for the new property, the duplex, whilst hopefully simultaneously making my loan on it more palatable if you will?

Two deals simultaneously for your first outing is fantastic. 

The terms usually undercut the realtor pretty severely while simultaneously charging the buyer 2-5% of the bid price plus a "technology fee" and some other crap.

And you don't necessarily have to close on them, if you find a buyer to wholesale them to prior to your closing, you can always do a "simultaneous close" in the states that allow this. 

You could have it call your cell phone and business line/home line simultaneously and whichever phone you pick up first that is the line you will take the call on...

For instance: double escrow, simultaneous close, double close, ect.

Bear in mind that I plan on doing each flip one after another, not simultaneously.

I have been and am still a very big fan of Self Storage.We are currently selling some of our Facilities at top prices and simultaneously positioning ourselves for one of the biggest land grabs in history - or at least for me and our Company - in the next few months to couple of years.