Hi, I see your project is small and simple. So, writing a script to move your emails from one folder to another won't be a problem. I am an It Engineer and I work exclusively with Outlook projects.
There is really not much to say in this case, your project is quite short, so my price. I could enter in your range of 10-$30, but an Add-In is not only a small script to do something, it also needs to work on your Outlook version, with the .NET framework you have and with the Windows bitness you use, so it is not simply copy a script in Outlook and it is all set. Nevertheless, it is not that difficult to have this ode working for your Outlook.
Anyhow, if you need more details about the development of your project, just send a message.
Regards,
Joe.