What you'll need
Four accounts. Free or close to it.
n8n
Free self-hosted, or n8n Cloud starting $20/mo
OpenAI API key
Pay-as-you-go, ~$0.0003 per reply
Twilio
$1/mo for a number, ~$0.008 per SMS in US
Your CRM
HubSpot, Salesforce, Follow Up Boss, GoHighLevel — anything with a search API
The math
What this is worth, conservatively
Real estate lead-to-call conversion (no instant reply)
~8%
Lead-to-call conversion when reply lands in 60 seconds
~16%
On a 50-leads/mo pipeline, that's 4 extra appointments
+4 calls/mo
At $500 average commission per closed appointment
~$2,000/mo
Cost to run this template forever
~$48/year
Numbers based on Lead Connect Inc. and InsideSales studies of response-time impact on conversion. Your actual results vary with vertical, lead value, and how the qualifying question reads.