Pretty sure when HC's get canned they are paid through the end of the contract unless they take another coaching job (meaning OC or pos coach) so Kubiak is being paid as a HC through the 2014 season..
He may just relax and get healthy then come back and interview for the vacant HC jobs next year... He will take a pay cut and more responsibility by coming here...
The lame duck staff will get lame duck guys looking to add to the resume. The only chance I see Kubiak here is if he feels he can sneak in through the OC job to take over as HC..
The only reason I don't worry about the money is because Ross isn't afraid to pay. If Kubiak argues money and Ross/Philbin really want him then Ross will do what is necessary via the checkbook.
Kubiak has to determine 3 things: Is this a playoff team (talent wise) the next year or maybe 2 under my offense? Can I get Tannehill to be a 90+ rated QB carrying his team into the playoffs? Can I find the next Foster/Tate to take some pressure off of the passing game?
If Kubiak can show he got the team over the playoff hump, built a balanced offense (which he now will have shown in Den, Hou and Mia), and got a young QB into top 10 status then he is back into the HC conversation.