You're note getting 100x increase in instances without justifying it to your account manager, anyway, long before you figure out how to get it to work.

EC2 has limits on the number of instances you can request, and it certainly won't let you 100x unless you've done it before and already gone through the hassle to get them to raise your limits.

On top of that, it is not unusual to hit availability issues with less common instance types. Been there, done that, had to provision several different instance types to get enough.