Well, as always there are more questions, but thats a good thing.
First, what kind of soil are you digging in? Rock,sand dirt or ledge? The easier the soil, the faster the dig, Sand dirt, or some rock, about a day for the dig, then another day for backfill, if there is a hole.Unknow about ledge, as you will need to blast.
Second, you mention footings?, But you have a slab on grade concrete pad going in...you don't need footings. So if you need to pour just a slab, it will be one day. And for cure time, you can cut that down to about 2-3 days with additives and faster curing concrete. besides, if this is a single story, there wont be much weight.
If it is a footings scenario, you will need 2 pours, and need to infill the footing.
A day for the plumbers at the most, but they need to actually show up. They are the most unreliable due to plumbing emergencies..you go to the back burner, cause you paid less money.
A day for the gravel and vapor barrier is a little much, and they pour mesh right in the concrete, unless you require steel mesh due to earthquakes. So keep a day for that.
I guess about 7 days would be the quickest, depending on the money you spend.... ;-) Good luck.