There is no way it will cost $60. YouTube TV, which gets you a lot of channels, including the best of this package, is less than $75 a month. Sling TV, which gets you ESPN, ESPN2, ESPN3, TNT, FS1 and a lot of other channels too is $60 a month.
In my area, YES Network (Yankees / Nets) and MSG Network (Knicks, Rangers, Islanders, Devils) went a la carte last year @ $25 and $30 a month (less if you pay annually). The regional sports networks fetch a premium because they have specific fan bases by the short hairs.
My guess on this package is $30 a month. It's a lot of channels, but there isn't enough must-see live sports for dedicated fan bases to make it so they can push the pricing up too much. ESPN is into rights fees to the sports leagues for a lot, but that doesn't mean they necessarily are able to find people willing to pay beyond a certain point.