So I got a space heater with a thermostat that keeps the inside above 68° so should I get rid of the basking area all together? All the information I have found online says they need a basking area that is around 100°
The basking spot only applies to juveniles in indoor enclosures. Is there any way to get the heat up to at least 75?
The problem with them both being in that enclosure, is that they can constantly see each other, so they literally can never escape. Just seeing another tortoise is very stressful on them, and an enclosure half that size for each really wouldn’t be the end of the world. Another option is to rehome one tortoise, but it doesn’t sound like you want to do that.
For the fence, I would just take some metal sheeting or long wooden boards and mount them along the bottom so that they can’t see out.