Here we go with some calculations:
Utah has 13.65M in capspace. They can use this money to either give R&E to one or both(more likely one) of Hill and Favors or they can give some part of it to DMo.
Here's the cap situation in case we want to sign DMo(read in clutchfans they are floating 23M for 2 seasons guaranteed number. lets say it's true and the Jazz want to give him 12M in first year and 11M in the second year).
Contracts for 2017-2018:
Derrick Favors : 12M
Joe Johnson: 10.5M
Alec Burks: 11M
Dante Exum: 5M
Trey Lyles: 2.5M
Rudy Gobert: 21M
Rodney Hood: 2.5M
DMo - 11M
------------------------------
75.5M
That's WITHOUT Hayward (possibly around 28M) and Hill(Lets say 20M) and that is without Diaw(7.5 non-guaranteed, Neto 1M non-guaranteed, Joel Bolomboy 1M non-guaranteed, Joe Ingles 2.6M QO, 2 first round picks of about 1M each). I'm not including ANY of them.
If we want to keep Hayward and Hill we would be at 123.5M with 6 more roster spots to fill(or at least 6 more million in salary cap to fill). This would be way over the luxury tax(currently projected at around 122M). This is not happening! The Jazz won't choose DMo over any of our key players(Hill, Hayward, Favors). It just makes no sense at all.
The other option is to give him just 1 year deal, but then again... why would we choose that instead of relieving the money crunch we will have in 2018 by frontloading either Hill or Favors contract? Why would anybody choose 1 year of DMo(whose condition we don't know anything about), over making it much easier to keep our core long-term? Again, it makes no sense.