Dear Sir,
I have developed client applications for Betfair and Betdaq API for 2 and a half years. I created automated betting systems and many betting strategies. Both employers for which I worked are from London. I am unable to send you my CV and reference from previous employer through this bid (it doesn't allow attachments).
For this project I can say that placing bets under certain rules on Betfair is not a problem. We can also create simulation mode for bot, if you had that in mind with fake wallet? I already did this in one of projects on which I worked. I also created parsers to collect data from some websites, so collecting betting forecast from some website shouldn't be a problem. Only problem here could be connecting betting forecast with correct Betfair market, but this can also be made with some restrictions.
Your max bid amount of 250$ is too low for this project. I charge on hourly rate, 15EUR/hour. If you give me more detailed specification on what you need done then I could give you estimate on number of hours needed for that project. Right now I can only work part time on this project, max 20hours per week, because I have full time job.
For solution I would use Visual Studio 2005 or 2008, Framework 2.0, C#. It is much easier to work with Betfair and Betdaq API if you use .Net!
Regards,
Rade