Quarterback Colin Kaepernick should be dominating the 49ers’ off-season agenda. He could sign the richest deal in team history and that could and probably should happen this off-season even though he has one year left on his 4-year rookie deal. Sign Kaepernick and other 49ers’ free agents are more likely to stay, knowing the future is bright due to Kaepernick’s fast feet and that heavily tattooed and undeniably powerful right arm.

But what will it take? Franchise quarterbacks are going for about $18 million per minimum these days, and that’s where it should start even though it’s debatable that Kaepernick IS a franchise quarterback. So $18 million a season for 5 years and the 49ers are looking at a $90 million deal, with $30 million to $40 million guaranteed.

That’s enough for the party pad in Tahoe, the palatial spread in Saratoga and enough cheese to support Kaepernick’s sneaker collection habit and make him the Imelda Marcos of high tops.

However, such a deal could put a serious crimp in the 49ers ability to sign other players such as linebacker Aldon Smith, guard Mike Iupati, safety Donte Whitner, wide receivers Michael Crabtree and Anquan Boldin and cornerbacks Tarell Brown and Carlos Rogers.

Does Kaep want to ruin the team’s cap?

Here’s a solution. Kaepernick still has one year left on his rookie deal that pays him just over a million. So the 49ers could eliminate that final year and get Kaepernick the big money sooner – at a discount of course.

So instead of $18 million for five in 2015, how about $15 million for five in 2014? Kaepernick gets to be Imelda Marcos one year early and the deal is essentially the same because the woefully underpaid 2014 season is wiped out.

Also Kaepernick’s lighter deal would allow the 49ers to possibly sign Crabtree and Boldin among others. And, like all contracts of this magnitude, the agent will dress up the deal, stretch it out to seven years and pack it with Monopoly money at the end of the contract that Kaepernick will never see.

So it will be announced as say a seven-year, $130 million deal just so it can be more than what Bears quarterback Jay Cutler received last season (seven-years, $126 million).

The 49ers like deals like this. They signed Joe Staley, Anthony Davis, Vernon Davis, Patrick Willis and NaVorro Bowman while all of them had years left on their deals.

Kaepernick should like it too. As last year proved, Kaepernick’s passing game is only as good as his receivers, and without them, Kaepernick could become something nobody wants. The overpaid underachiever in the land of Joe Montana, which could lead to mass firings and wide spread twitter pestilence. And who would want that?

Twitter: @klynch49