there should be multiple qualifying touchpoints, calls get their own whether its Ai or human, ads get their landing pages/funnels or FB qualifying questions.
For free estimate buttons on the site NEVER start with name and contact info, create a simple step by step "build my (insert product here)" that asks them qualifying questions regarding size, budget, time frame.
Try and only show one question at a time, then at the end ask for the contact info to reveal their price (should be blurred) once the info is collected remove the blur reveal estimate price and offer a Email my Estimate and Get it in Writing buttons, one that sends the estimate to their email/phone and one that links to a scheduler to book onsite estimate.
im a hard qualifier, i rather know as much information as possible to make the quickest decision, if i cant help i point to resources that can so i dont lost customer service, the key is to always offer something of value whether its advice or referrals.