Dak's contract is going to be the killer. Even if he never plays better than he did in 2017, he'd still get $25 mil a year.
We've got the money to pay Martin, and both sides want a deal to happen. It'll be expensive but worth every cent. D-Law's will be much more interesting though.
I don't think Irving factors into the team's long term plans. Super-talented pass rusher, but he's just such a freaking headache, and I don't think the Cowboys are willing to give him the guaranteed money he's going to want.
Jaylon, Gregory, La'El, Byron, and Maliek Collins are all pretty much just potential at this point, they're not production. They've all got talent, and I bet that one or two of the group will emerge as studs by the time their contracts are up. But if they all hit the market right now, I'd be stunned if any of them got more than 4 or 5 mil a year. They could all walk right now and we'd basically be fine.
We have 3 more years on Zeke's deal, and we can tag him after that (a top 5 salary doesn't hurt for a guy who's probably going to be a top 5 RB any year he's healthy). That gives us a lot more of #21, and we'll see how much wear and tear he's got by the time the bill is due.
So in short, the only contracts I'd even be concerned about is Dak and maybe Lawrence.