While some of you may know, I'm a Florida grad who's had season tickets (student & alumni) since 1975, so I'm very familiar with both Dan Mullen and the SEC.
First, if Mullen likes the job, you'll have a good chance of convincing him to come to Minnesota. Urban was at Utah for two years before coming to Florida (& bringing Dan with him); Mullen has seen it done and (IMO) recognizes good opportunities in his profession don't always present themselves at the most opportune times.
Second, when Mullen took the Mississippi State job, we wished him well - - - and worried he was taking a "career killer" job. Mullen has to go up against LSU, Alabama & Auburn every single year, all of which have significant recruiting, etc. advantages over Mississippi State - and he's at the "second university" in his own state (think Michigan State recruiting against Michigan ... or Iowa State recruiting against Iowa).
MSU's program was in very bad shape when Dan arrived in Starkeville. He's put together a decent staff and "punched above his weight" in recruiting.
MSU philosophy & other info
Mullen is a "spread" guy. He's pretty aggressive - folks down here think he pushed Urban to attack more than was comfortable for him (a constant complaint here the past two years has been that Mullen's successor is too conservative).
IMO, Mullen is the kind of guy Minnesota is looking for & needs.