Im a bit wary of UTH because I've heard it more easily burns the snake On the other hand I've seen people say it wont heat properly through a PVC enclosure + substrate...

Its honestly been so confusing to research the topic of BP husbandry, there's a lot of contradictory info online. I've seen setups like the ones you described, others with 2 overhead heaters, UVB, no UVB, etc, I never feel like I'm ready