What is the best niche to start e-business in?

Hi! I'd like to hear from genuine achievers working in any type of e-business what might be the most appropiate thing to do online in order to comply with following:
1) business to be managed in online environment only so selling actual stuff such as on eBay is rulled out
2) easily expandable without applying much work from my part
3) my goal is to turn business as my only source of income within 1 year and desired income is around 4k $ a month.

Right now I am reflecting on which model would be right for me since there are so many of them. So I am looking at running a website and placing ads on it, becoming an affiliate, running a membership site, reselling web hosting and selling drop-shipped poducts. I just don't know where to start and probably you could give me some hint or suggest some more ways of doing business online. Thank You!

There has been many studies around the trends of the baby boomers. The focus seems to be on health and wellness and continues to rise. There are many ways to start out small on the world wide web and tap into this market.

I think you've already mentioned a few good niches. Advertising is no doubt a hot niche; web hosting is good but extremely competitive, just check the adwords campaigns on it.

In affiliate marketing, gambling, credit cards, dating are very hot but also have a lot of competition. It doesn't mean you can't make money with it, it'll cost you more money and work to obtain results.

My suggestion is that you choose something related to your skills, your hobbies. Besides being possibly a tinier niche it will be something you enjoy working on.

And by all means DO NOT start five different things at the same time. This is the sure way to failure.

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You can start with low risk methods such as starting with free blogs to test the waters.