AI Agent Builder SMS Marketing Bot expert needed

I need someone with EXPERT level experience to build us an sms marketing bot.

Requirements
Must send SMS messages to list offering roofing services and buying houses
Must have the ability to reply, answer questions, etc., and set the appointment
Must be able to set an appointment through system to show on calendar.

*No down payment
* Payment after bot is setting appointments and adding to calendar

$2500 max budget