Yup, easy... all you gotta do is hit 90 with three pitches as a rising HS junior 
Seriously, huge congrats RHPitcherparent.
But your son has attributes that are extremely rare. So, stating this as some sort of blueprint for those parents and players who don't have the time or money for travel is a bit skewed. There are certainly many different paths that can be taken. But, for the vast majority with more earthly skill sets, some version of travel ball that affords exposure to the right audience is quite useful.
Another point I would make that applies to the "earthly skill set" group is that if you aren't committed to making the time, the results are likely to reflect that lack of commitment. But, that pretty much applies to anything worth working for.