Let me say I'm a college student with a dorm apartment, and I tried hard to make a 5G+ work for me. It didn't.
I eventually downsized, and you can see my two tanks in my signature.
They get moved a maximum of 6 times a year, and while it's a pain, it's my hobby.
If you can't get to my signature, I keep a 2G Fluval spec with several mods, and I have a DBP 18" long 3 gallon tank.
I pack them in bins and drain 60% of the water when I move them.
I can take pictures if you need help