Sounds like you did a bit of research before registering for the site. Awesome! It's perfectly acceptable to use multiple UTHs, as long as they're each individually regulated by a thermostat. Tubs work very well - it's just as easy to control temps/humidity in one of those as it is in a T8. It's definitely cheaper to get your husbandry dialed in and to have your new arrival feeling secure if you go the tub route. Having said that, the first enclosure I had for my first BP purchases (as 100ish gram hatchlings) was a divided T8 which I cluttered up and got dialed in perfectly before adding any inhabitants and it ended up working very well for me.

Regardless of the route you go, I'm confident that you'll do it right based upon the questions you're asking in your first post!