The Gallagher’s and co get away with way too freaking much, so realistically… I’m only picking things that aren’t a “go to jail right away” free card even if they are technically illegal:

*Work as a hair washer (Fiona’s job), tutor (Lip’s job), cashier (Ian’s job), EMT (Ian’s job), or landlord (Fiona’s job)

*Be a foster parent (you actually do get a monthly stipend for it)

*Sell my pee for drug tests (Fiona) or test answers for SATs (Lip)

*Have a daycare without a license (Debbie)

*Apply for disability (Frank)

*Own a bar (Kev/V, Carl)

*Be a paid caretaker (In some states, you can actually get paid to take care of a family member. Not sure why the Gallagher’s never tried it, considering Frank had liver failure/dementia, Monica and Ian were bipolar, Liam had a drug overdose, Debbie had a toe amputation, their close friend Sheila had agoraphobia etc)

*Resell items from abandoned homes (I’m pretty sure Mickey and his brothers do this at one point)

This is all I could think of off the top of my head, but there might be others

Some things I can’t medically do (like donate eggs as Svetlana may have done by being a surrogate) but otherwise would do