I made sure to have everything leveled up to max before the Command pack came out. Then it's easy to see what you need to upgrade for the new toys. I upgraded everything new except for the silverback now. That thing does take a lot of money to max out. Play private by yourself, enable Super Reload mutator, and you will earn money real fast. After that, either start over or make sure your silver back gets damaged a lot, that way you can spend all your money on upgrading it. If you don't have the Super Reload mutator unlocked, play private vs with 9 bots to work on your 100 kills with each starting weapon. One thing's for sure, this game take a large investment of time to get the most out of.