You sound like a very responsible pet owner.
I went through my dorm years with my turtles in a 55g tank under my bed, very long story lol.
I would say if you don't have length go with height. A chameleon or something similar but I imagine heating would be a chore living in Alaska.
I've learned more helpful and practical information on this site in the last few weeks then all the time talking to local breeders near me.
@Tom
Save an SA Leopard for me please! I rather get one from you than a local near me.