Also some more info to make sure you favor getting bugs from a starter. As you probably know, Brett and bugs don't crash out like sacc does. So pitch at least some of the liquid from you starter(esp the RR) because the ratio of bugs/Brett to that wine yeast will be higher in the liquid. The settled out stuff will have a higher cell count, but more of it will be wine yeast. I would suggest a two stage starter. Let the first small starter ferment out. Then decant off the liquid into more starter wort. Kind of the opposite of what you would normally do.
FWIW I haven't done this yet, but in theory it's solid. I plan to do this with my consecration when I get an empty carboy.