Migrate 3CX to Yeastar PBX

I have a brand-new Yeastar cloud instance already spun up and a Twilio account fully authorised for Australian numbers. My existing 3CX PBX is still live, but I now need everything cut across to Yeastar within the next 48 hours... (Budget: $30 - $250 AUD, Jobs: Documentation, Technical Support, Troubleshooting, Twilio, VoIP)