I would say with 50-100 high quality products you can certainly reach $200 per month. Probably much more if you have a good niche or sell products that are in demand. I've seen some veterans averaging $6,000 per month (but I don't know what they were selling, they obviously have a good niche).
1 year is a good target to aim for to begin with, just be aware most sales/business works on a linear curve. This means that your first year will probably bring you in less than you expect, but your second, third, fourth year will be much better. If you keep a steady pace (uploading a new product every week or two), I will say you would probably double your income every year as long as you have good descriptions, ratings/feedback, etc.