There are thermostats available online/from reptile shops. I use the Habistat Pulse but there are others out there, they are great as you can be sure that ur viv is at the right temperature. However the Habistats have a 1 in 3 fault rate in their units so ensure you monitor your thermostats for a good couple of weeks after buying it.
It is recommended not to handle your BP until they settle in which should take about 2 weeks or so. Most go off their food after a big move so it tends to be unusual for a BP to eat straight after getting it. DO NOT handle him for a few days after feeding as this could cause him to regurgitate his feed.
Excessive roaming is usually a sign of stress, BP suffer from anxiety and or agrophobia in large spaces which is why many people keep them in small rubs. In the wild they will often be found in a tiny hiding place, only coming out at night. It seems that his viv may be to large for him so go down a size, a BP only really needs a viv half - 2/3rds their length but babies will only tend to need small rubs.
I hope this helps![]()