Custom Email Bot for Web Based GoDaddy Email

I need someone who can make some sort of web-based bot to respond to emails one of our POP3 mail accounts receives. We get hundreds of emails per day. We need a program that will respond to each email we receive 20 minutes after it comes into the inbox, with an HTML email we have. It will be basic text with some clickable links in it. So, we would need to have a WYSIWYG editor in there so we can make HTML responses. So, when an email comes in, 20 minutes later, this bot or program needs to reply back to the person with a pre-loaded HTML email we have put into the software. I do not have a huge budget, and this shouldn't be a very hard job at all. Please let me know how much it will cost and how quickly it can be done. I'd prefer someone with good feedback and am not looking to pay until the job is complete.