The base gets the budget before the finish
On day one, a good base and a bad one look the same, because both are under the concrete. That's why the base is the first thing cut when money gets tight, and why I won't cut it. A nice-looking slab on raked dirt settles with the dirt, and one that falls toward your house sends water right where you don't want it.
So we dig out to firm ground, pack the base and check where the water runs before anything gets formed. If you need to save money, I'd rather you pick a plainer finish than a thinner base. A plain slab over good prep usually holds up better than a fancy pattern over bad prep. You can dress up a surface later. The base you only get one shot at.

