Other than selling stuff like plasma, consistent income is gonna require selling your labor some way or another. $125 over a weekend is doable with most side hustles and gigwork fwiw. if you have an efficient car, delivery apps on friday nights can usually break that. keep in mind a small car costs like ~$0.40 a mile to drive, between gas and wear/tear/equity. Lived in a smaller college town and I think I was making like $10/hour after expenses if I wasn't selective about hours, or $15/hour if I only did peak times.

With a W2 job you'd probably need like 700 to get 500 takehome. So might mean working full shifts sat+sun or just picking up a few hours whenever depending on what wages are in your area. It kinda sucks but a lot of people do it. Better if you only have to do it for a few months.

Side hustles like tutoring, lawncare, cleaning houses, packing/moving, changing tires, detailing cars, whatever, all kinda depend on your skillsets and social connections. but $500/month is often doable between hustles and plasma.

"make money" apps range from scams to legit. for the most part you're trading time for pennies. but if you have downtime at work or anything like that, then something like swagbucks can get you 50-100 a week if you do certain offers. check /r/beermoney or /r/swagbucks if you go this route and keep in mind an offer to try a mobile game for like $75 will likely take 20-30 hours of gameplay to unlock. I come back to this every few years and always decide I'm better off directly trading 10 hours of labor on a gig app or part time job than 50 hours of distracted "labor" that I have to babysit.