I've noticed across accounts that your speakers don't start regenerating until you sync your account with Facebook or ATA.
When you get bigger! Roughly around 30 or 40 mil cs maybe? It depends. Right now you should focus more on upgrades!
Thats why I said it depends from player to player! I think upgrades are better if you're still small. Just my personal opinion
Building bfa and building a ally trading base are two different things. Bfa allies are the ones you typically over price cause you want to keep them. These are the ones you will spend a small fortune on and you honestly dont need to rush into building bfa until you have reached a decent size in stats. Now for using allies to turn a profit, you would be doing yourself a favor investing as soon as possible. That said, finding the right allies that will sell quickly and need to be replaced often can be tedious work. But when you get the hang of it you will make some good gold.