If you have to spend a lot of additional time " floating " then you would obviously have to allow for this in your calculation.
Being well organised saves time, using the most appropriate products and methods will save time and energy.
In the majority of cases I clean dining or office type seats with an enzymatic prospray, followed by crystallising foam.
It works...............gives an excellent result.............keeps clients happy..............saves set up / clear away time.............gets repeat business!
Commercial work is not about achieving the highest possible standard by using the greenest possible product...............it's about achieving the customers expected standard for the negotiated price.