Ok, I've got the solution.
I must warn you, it's out there...
Step 1) Storm say they won't re-sign Smith due to the Harry Grant situation.
Step 2) Broncos sign Cameron Smith on a 1 year deal for 2021.
Step 3) Craig Bellamy becomes available in 2022.
Step 4) Sign Craig Bellamy as Head Coach on a 3 year deal. (2022-24)
Step 5) Sign Cameron Smith on a 3 year deal as an Assistant Coach.
Step 6) Once Bellamy retires at the end of 2024, Cameron Smith takes over as Head Coach in 2025 with a few years of assistant coaching under his belt.
Step 7) Profit?