I made the same calculation and I agree that you can't work all the time but reloading in no way helps you shoot more. The price difference is too small and the time it takes to reload too long, especially seeing how ammo is so cheap. Think about it, it takes you about 24 hours to cook up 1,000 rounds! That's nothing, you can burn through 1,000 rounds in just one range session if taking the family. You can get 9mm on sale for ~$8 a box, 556 for 20-25 cents a brass cased round, and 7.62 NATO for 25-40 cents a brass cased round. 12 gauge can be bought very cheaply too. Throw in a bunch of 22's to save a few bucks and shooting doesn't have to be that expensive. All you have to do is click BUY on the online store or offer to make a deal with your local gun store and more than a few are happy to do so if you're buying in huge bulk.
Maybe the biggest problem with reloading is you have to take your time, cannot cut corners and be careful in that it cannot be rushed or you will suffer bad consequences. Having seen it and briefly tried it with a friend's equipment it takes too long for too few rounds and sharply limits your ability to go to the range. You're basically wasting all your afternoon for just a paltry amount of rounds you could have bought in massive bulk quantities for not much less money.
Well, all I can say is that my experiences are vastly different than yours.