Humidity for Kenyan Sand Boa

[eleni]

I plan on getting a kenyan sand boa pair and a setup for the babies, but I'm a bit worried about the humidity in the only cat-free room in the house. It currently has a humidity about 50-60%, like the rest of the house, but I'm going to get a panther chameleon pair in there which would raise it to 70-80%. Would this be too much humidity? If so, what humidity would you recommend?

If this room doesn't work out, do you have any tips on cat-proofing racks? Or maybe tips on other, preferably not too expensive, options to keep the babies in that lock? The only way I could keep them in another room is if my cat had no way of getting into them, and the babies had no way to escape. My cat could most definitely find a way to get into sinope rack setups.