Jvls makes a good point. If you're only staggering them by three days, there's a very good chance you'll be opening the bator to take out the first lot of chicks when the second lot are pipping, and that would risk shrink wrapping them. Though I've had to do that recently and found that as long as I kept humidity above 80% I didn't have any problems at all. But if you can be sure that your other eggs are going to arrive on Saturday I think I'd wait and set them all together.
I'm doing an ongoing staggered hatching experiment at the moment, and I'm in lockdown with my second lot of eggs right now. I don't know how to put up a link to my thread about it but if you search through my posts you'll see the title. Reading through it might give you some ideas - if only of things I'm doing totally wrong, LOL! But I got good advice from several people and I've written up my hatch so far.