Easiest way to do your portable miner is just to buy an ASIC. However you will need an Ethernet cable to plug it in for internet and that’s it. Very portable. Just a small box with a PSU connected to it.
Could the Internet come from 5g/4g?
What are likely returns per day if its running say 4 hours a day?
I'm self employed but rent an office that I get access to at a cost per use, and it comes with bills all included for that short time I use it, so want to make the most of my time renting that space.
The kind of miner you would need to run to make even a dollar in 4 hours would be so loud and kick off so much heat that it would get you fired or annoy you to the point you’d pay more to be rid of it.
There are silent miners that don’t kick off massive amounts of heat, but you’d earn about $0.10 per day using it. Basically, mining isn’t something you can do part time and you’d never recover your hardware costs that way.
The only way your plan would be any good at all is if you had a gpu sitting around or in your office machine that could mine while you’re there.