I made a fanzine (Xerox copy produced magazine) covering bands that were due to play in my town.
I'd print the whole thing except for the cover, and I'd then print the cover on the day of a gig with the headline band on the front.
I could produce these fanzines at 30p, and sell them for up to £2 (exact price depends on the people in the queue I was selling to). I could also sell over a hundred at each gig. Which means £170 profit per night.
Gigs only happened 3 or 4 days a week, so I could only bag around £600 per week from this.
That said, it was quick and non-traditional. Requiring only A4 paper, a pen, and snippets from other music magazines (photos).
I did this when I was homeless and had no skills.
Now you have skills in web and mobile development, skills worth way more to people than me selling fanzines at a gig.
If you want to make some money, get the yellow pages and pick up the phone. Go find a local business park and knock on some doors. Walk in and tell them what you can do, what you offer, and explain your situation. Offer to fix their networking, their printer, their website, to add a feature.
MOST SMALL BUSINESSES HAVE NO TECH PERSON.
They pay over the odds and always have nagging little problems that they will pay to fix.
More, once you've done your role as an odd-job techie, you'll be on their books as someone who can fix something. Allowing you to tap into a little future stream of money too.
But ultimately, how badly do you want the money? Because this money is there, if you want it bad enough. But it does take some leg work to find those small companies who don't know how to find you (this is why they pay a premium).