Hiredesk, getacoder.com, etc. are some good resources.
From personal experience I don't work with programmers that are also traders (or trading their own systems). WAY too much conflict of interest introduced that way.
You can hire a full time year round programmer for (depending on whereyou live) around $50k-$65k. That's $1250/week or $5k/month. Seems like your estimates are VERY high.
Also, don't know where you are located but winter break is coming up - do you have a college/university around? Do you have the ability to spread out the workload by hiring a college student?
Just remember that once something is learned its not possible to "unlearn" or forget it. Individuals in the Gaming industry are usually pretty good bets. Usually they are smarter than they look and have zero finance experience.