Minnesota has been 'doing things the right way' long before Coyle, and hasn't had billionaire donors willing to support the school since running off Sanford nearly 20 years ago, who also 'doesn't do things the right way', at least not in the way the U wants them to. This isn't going to suddenly change overnight.
Purdue isn't an outlier. The vast majority of P6 schools are similar to Minnesota and Purdue. If money was all that mattered, then Ohio St, Michigan, or Indiana would win the B1G every year, but they don't. Kentucky, Duke, UNC, Kansas, Lousiville, etc would win the NCAA Tournament every year, but they don't.
Schools similar to Minnesota aren't more competitive because they have more money, they are more competitive because they hired the right coach who has the right culture in place to win with lower level recruits. Then they add better recruits as they build their culture and prove they can win with lesser recruits. This has been the formula for decades.
Until the U hires a coach who can build a culture and knows how to coach first, it does not matter how much NIL exists. If BJ was running Purdue the last 3 years, they would be at the bottom of the B1G and not playing tonight. The Gophers need to find their Matt Painter, Bo Ryan, Tony Bennett, or Jay Wright.