50 gallong tote, would be used only for short term. A russian can't live in such little space. I would build a 4x4 or a little bigger. If you cant house it with the right size enclsoure, and all the equipment, i would just find a new home for the tortoise. I know it was a gift, but sometimes you have to think of the animals.

Side note:
What type of lighting do you have?

Dont forget to take your russian to the vet this week, you need to deworm him/her, or you will have major problems to come.