I have (and have done) a few gigs that could (conceivably) get you that amount without any starting cash or skills:
1) Go on as many freelance sites as you can and sell the steady but unglamorous content work-review writing, proofreading, copywriting/ghostwriting, and anything else you can do that someone would pay for.
2) Get on Ebay, sell your books, CDs, spare clothing, jewellery,
3) Go to agencies offering casual work- labouring, waitering, any day-work, and to Craigslist for any odd jobs.
4) Go out early in the morning (like, 5.00am) and pick up cans until you have a garbage bag full of them. Take them to a scrap metal place at the end of a week and see what you get.
5)Go to a local college or university campus and put up flyers offering to edit essays and dissertations/punch up CVs and covering letters for those who are graduating/ghostwrite essays
^all of these I have done.
Moving on, got a car?
6) Courier
7) Cabbie/Uber
8) Deliver pizza
People always advertise for these. Valid license and vehicle, and you can do them all.
Possible, but no guarantee you'd be paid enough or on time:
9) Clinical trial volunteer, assuming you're reasonably healthy and not taking any prescription medication.
10) A few things in the
hustling thread