It took me literally 10 minutes to come up with this while I was shitting, but if Stephen can break away from the Jones family redneck retreat long enough to use his brain for a few hours I'm sure he could come to the conclusion that this deal, or literally anything similar, would be far better than tagging Prescott, and give us way more flexibility.
4 years, 156 million (39 AAV), 28 million signing bonus, 100 million total guaranteed.
Year 1: 34 million cap hit, 25 million of salary guaranteed. 28 million remaining of SB proration, dead cap of ~53 million if cut
Year 2: 37 million cap hit, 25 million of salary guaranteed. 21 million remaining of SB proration, dead cap of ~46 million if cut
Year 3: 41 million cap hit, 22 million of salary guaranteed. 14 million remaining of SB proration, dead cap of ~36 million if cut
Year 4: 44 million cap hit, 0 million of salary guaranteed. 7 million remaining of SB proration, dead cap of ~7 million if cut
That's basically a 3 year commitment because we could cut him going into year 4 with only a 7 million cap hit. He'd be uncuttable over the first three years, but is that really much of an issue when we already know he's a lock to be here in "year 1"/2021 for 37 million anyway if he's tagged?
You'd save 3 million against the cap in 2021 compared to the tag, and in 2022 you'd have him with a cap hit for the same number as you would've had him for in 2021 if you tagged him. Then in years 3 and 4 his hits are 41/44, which is probably below the inevitable 45 million/year contracts that guys like Josh Allen and Lamar Jackson get.