No it isn't.
$6M = 1/30th of my cap. $20M = 1/9th of my cap IF...huge IF...I transfered no money to spend it.
$6M, assuming you mean FA, means someone knows what they're getting because they have enough ML experience and the ratings are what they are.
$20M = lottery. A more focused, the odds are better lottery, but still a lottery that has to make it through correct coach hiring, injuries and general know how.
Seriously. If it worked, that strategy would win more than once every 32 times. It doesn't.