Hi there. I made my living working at home for four years.
For two years, I worked for a very small consulting company that had no home office. Everyone was remote/from home. I was doing marketing consulting.
Then I started freelancing, eventually forming my own business (LLC). I found all of my work online, did all of my work out of home, and got a six figure salary. I also hired three people full time who all worked from home in different time zones. (To this day I haven't met one of them face to face!)
Some things to consider:
1. Think about if you want a full-time position from home, or if you are willing to do freelance/consulting work. There are tax implications as well as other considerations (health care, variable income). Depending on the situation, the freedom of freelancing can be liberating. Also, if you're freelancing, remember that your hourly rate doesn't equal your hourly take home rate, since you'll need to spend at least 50% actually getting business, not just delivering. (That's just an estimate, but verified by many other home workers).
2. If you will be working with a company (the current company I work for hires several people who work at home full time), how often will you be expected to travel? Many of those people at my company must travel at least 1 week every month.
3. Are you flexible with your work hours? Remote working means you'll be dealing with people in other time zones. Can you wake up at 7am to take a call? 5am? 10pm? If you're flexible, there are more opportunities.
Some resources:
Elance.com : I found the majority of my work on this site. It takes some time to build a positive profile with reviews, but once you do, it's easy to get work. They have a ton of different work on here.
odesk.com: Cheaper work, harder to get decent pay. Good if you're desperate.
craigslist.com: Worth a look, but I would avoid normally. Not worth the time, elance is much better.
Also job sites will list "remote" for full-time positions that can be done remotely.
One last thing: don't sell yourself short. Just because you're working at home doesn't mean you can't get great pay for your experience. If you look diligently, chances are you can find a position that uses your skillset. Three of our VPs work from home, and they get paid VP salaries.
Good luck. Working from home is awesome! As someone else said, it would be helpful to know your (or your wife's) background.
I would avoid day trading as a job ... not a reliable source of income for the majority of investors, mostly due to trade fees.