The problem I see with this is that if the customer refers you, there’s an expectation there to ‘look after’ the referred customer. It can possibly become a burden over time, and I don’t see myself wanting to go the extra mile for these customers either.
The other problem is that if you’re willing to drop your prices this dramatically for one customer, then why not every customer? I don’t think it is sustainable.
For me, I find that it is a healthier practice for the long run to set and stick with a crazy high price point from the start, manage the customer’s expectations so that they understand why I’m more expensive and then massively over deliver. How many local guys remember the customer’s son’s name, remember when they moved and where they came from? How many leave a complimentary ‘Touch Up Kit’ with all first time residential customers, and are flexible enough to not make the customer wait weeks for a booking? None - and that’s why I can charge double as a minimum.
Just my opinion, and all coming from an unsaturated market, so take it all with a grain of salt heh