Can I still earn money from the redownloaded images that people redownload on my account?

When a licenced asset gets redownloaded, you get nothing. When a licenced asset gets relicensed by the buyer, then you get your standard share, depending on the buyer's plan.

The same image can be licensed over and over from Adobe Stock. I have some that have been licensed hundreds of times. As to how much you can earn in a month, no one can tell you that.