Looks amazing, though perhaps it's cause of the Youtube sound quality, but I can't see anything here tonally that you couldn't get out of a much easier to carry instrument. But if it's part of your heritage or a big visual part of your gig, more power to ya.
Contrabass balalaika strings are pretty hard to find, and are not made in North America. I'm not too picky because of this so I usually order them from Ebay, 3 packs at a time usually.