Okay so i have 2 Normal Ball Pythons (Both Females), and 1 Albino Red Tail Boa. I have been saving up to give them the most ideal and proper setup to get them all out of their current 30g aquariums with UTH pads to something easier to maintain. My plan is to purchase 2 Animal Plastic T8 cages one with the divider and house both ball pythons in that, leaving the other full T8 for the boa (4ft long) to grow into. I currently have no way of controlling the temperatures for my room.

Animal Plastics list:

T8/Sliding Glass x2
Sliding Door Lock x2
Flexwatt Belly Heat x2
White Fluorescent Light x3
Pop In, Pop Out Divider x1

Misc:

AcuRite thermometer/hydrometer x3
RHPs 20watt x2
RHP 40watt x1
herpstat ???

1st Question: Will the T8 divided 50/50 give the proper amount of space for each ball python?
2nd Question: Will the T8 last the boa for the rest of his life? Or would future upgrades be required?
3rd Question: Should i go RHPs instead of flexwatt? or combine the two?
4th Question: Which herpstat would be required to fully monitor this setup in each configuration? RHP(only), Flexwatt(only), or Both