I wouldn't suggest breeding that pair, since IBC doesn't accept VTs or random VT crosses, so the betta fish in all honesty would be petstore quality, and there are enough of those fish in the world already.
In saying so, I have no issues against VTs, (I own two) it's just that you shouldn't breed just for the sake of it, only if you have a good quality pair (not from a petstore!) and you are sincerly looking to improve the species:
otherwise it's basically just the idea of backyard breeding for quick cash, which makes no sense because betta fish breeding is a pricy hobby if you want to have a successful spawn.
I do not mean to offend anyone, but there are enough people going around breeding with no goal to improve the species whatsoever already.