Twilio SMS & Voice Setup

I need a fresh Twilio account configured so my business can reliably send and receive both SMS messages and voice calls. Beyond the basic provisioning of numbers and securing the account, I also want these two channels wired into our existing CRM... (Budget: £20 - £250 GBP, Jobs: API, API Integration, Asterisk PBX, CRM, PHP, Software Architecture, Twilio, VoIP)