My magic advice would be to do the pink & whites by using pink & white powders.
As in, sculpt the white zone 1 in white acrylic & then sculpt your pink into zones 2 & 3.
Rebalances should really only need to remove the area of zone 1 down and reduce the bulk of the old stress area & thin out the actual free edge & regrowth area of zone 3 and re-sculpt - that way the client is getting a real, chip free french - a happy client that will come back again.
I would not even try to cut corners really, especially at a time when clients will be looking for the best they can buy with their money in the current climate.
They are more likely to come back to you with a proper service, than a place that airbrushes on the whites, with no rebalance - considering that the rebalance is a very important part of a maintenance service in rebuilding not only the whites in the right place, but also the correct 'balance' to reinforce the stress area to ensure no breakages and durability for the client.
My advice would be to step away from the cheaper option and offer a premium service with a premium price. That's what I do & have I never been busier than I amj right now.
People are becoming more savvy as to where they spend their money, wanting something that will last & not mean they need to go back 3 days later as they have chipped/scuffed the whites etc.
I hope you understand what I'm trying to impart here - and I'm not trying to be smart or clever, just advising you as to how I work, with great results.