We send a text just letting them know we missed their call and will get back to them later however if this is a new project, send some pictures and we will get right back to them regarding their project. They also get a voicemail from me stating the same thing. A second missed call is a good idea, but usually we are circling back to them before this. It's rare for someone to call twice in a row without us following up first.
For routing - we don't go to anyone's house without having an agreed upon price ahead of time. If it's a site walk through, there is some thorough vetting that takes place before also. It involves with me getting on the phone with them and discussing budget ahead of time.
We primarily use a website form for all requests (the form in jobber). What I was mentioning on the call is when I am putting together their quote, I'm using the transcript from the initial recording, the transcript from the walk through (when we do one), as well as my own notes and pictures and put that in to chat gpt for our quotes. We do this because we may need to reference their request/ quote later and this way all the information is in one place.