Chase the leads you never get back to
Someone asks for a quote, you get busy on a job, and by the time you reply they have already booked someone else.
The part that reads and scores incoming enquiries is built and has run. The timed follow-up drafting that sits on top would be built fresh for your business, so this would be an early build of the full system rather than one already running.
If this is the one costing you the most, that is where we would start. Twenty minutes to talk it through.