Human trafficking yo!

Take my GF and sleep a lot in there

New free jam space for my bands! This is a game changer. Plus, 3m³ is about the size of my local underground venue, so bands can play and I'd never have to charge for the rent in my overhead cost. A place to workout in 2G would be kick-ass as well, or setup climbing walls with crazy dynos and try them at different low gravity settings.

I hope it doest just has fancy cables with electric magic, but also basic human needs

• water
• light
• air
• WC

Guns and drugs. Mostly not at the same time.

Nap time. No further notes.

Okay, after reading the comments I have determined that this is a magic pocket dimension, not a sci-fi pocket dimension. That's important. Sci-fi pocket dimension gas too many restrictions, but OP has been kind enough to gift us a magic pocket dimension. If I pop in on a flight, I don't fall to my death when I leave.

So, I set it up as a space for living in tight quarters. Like an RV, I guess. I make sure it has some exercise equipment, and I give it to my mom to use. She's disabled, and can't move a lot under normal conditions, and for reasons I won't go into, also can't do aqua therapy anymore. Low g exercise could help her, and we could slowly increase the gravity. Eventually, she could be healthy enough for surgeries that could get her to a better standard of life.

Book cheap flights, cruises, et cetera. Teleport into the room, and back out at the end. Travel the world. If possible, teleport my mom in whenever somewhere is not wheelchair accessible, and then back out once we've passed that point.

Make money to support the travel lifestyle by being a magician, or smuggler. Whenever possible use the pocket dimension to help people escape bad situations. Teleport in someone while in my car, drive to safety, teleport out. They're coming out relative to the vehicle, not the vehicle's position. Excellent for helping refugees, domestic violence victims, et cetera.

https://j.gifs.com/ygYrr6.gif

Sounds like that compact machines Minecraft mod

Can I take one end of a cable with me?

What's the max power I can get from the sockets?

Where does the eject button dump people and can it be set to dump things other than people as well?

Does time continue inside the pocket dimension if no one is inside?

What's the internal temperature/humidity? Is it regulated?

Can I choose what I take with me, or is it just everything im wearing/carrying?

Questions aside, I would fill it with all sorts of stuff that I might need at some point, but leave enough space for a bed and a desk.