Its not hard. Saying that IT programmers go for about $100-$200 an hour for a custom project.

I would think its a few days work ($1500-$3000) for a custom program.

Alternatively you could look at a "as a service" model where a programmer develops the software for you and you pay per alert (say $1 per Alert).

If you want some more info/ discuss email me (you have my email).