It would depend on the market the sites are in and how competitive they are.
Ugh, it looks like that being a webmaster and make lots of money online won't be an easy feat. It takes money, it takes time, it takes lots of energy.
I have about 60+ sites and I'm wayy overwhelmed...
Better not to put all your eggs in one basket. You can't ever guarantee that a site will be succesful especially with Panda out there.
It also depends whether you are promoting a business or you are a publisher/affliate marketer. The business owner can invest concentrate all their resources on the company website. The publisher may be actually in competition with businesses and only making $0.25+ a click. But the business may actually make hundreds or even thousands on a sale.
The big factor to me is the size of the site which will dictate how much time/money you need to spend on content creation.
If you have a nice revenue stream over time the sites can get build themselves up. Let say you have 10 sites making $100 each per month. You add one article per week per site. After 5 years each site would have 250 articles.
60+ sites is a lot. I'm having trouble promoting 5 sites (part-time). I'm actually working on 10 but rotate the sites in/out. My other sites are on their own except for an occasional new article.
Another thing this might depend on is how related the topics of these sites are to each other. If there is some topic overlap it might be easier to focus on both because you're to some extent really focusing on only a single topic area. It can also mean that you can interconnect these sites in such a way that the success of one contributes to the success of another.
For focus it is ideal to work on only one site, and if this is risking putting all eggs in one basket that may sometimes be a good risk to take. It depends on how much you believe in that site. This is obviously the case with big sites you might have big plans for. Otherwise it all depends on the size of each site, how topically related to each other they are, how time consuming they are, and so on. Roughly speaking, 50 mini sites (like one page or single purpose sites) could be equal amount of work to 10 medium sites or a single big one.
In my new (albeit very slowly realized) plan I hope to have just under 5 main projects overall; two legacy sites, music site and career, and up to two entirely new web projects. I think the important thing with multiple projects is to focus on one at a time. One day on one project only, the next day another project, and so on.
One common question, especially among those new to creating websites, is how many websites should a person have? Well you have to look at many factors. If you have a huge advertising budget and are creating a online commercial store, then probably one or 2 should be fine. If you’re creating content driven sites such as blogs, directories, forums, then you probably want to create quite a few. The more websites you create the more income in the long run you can make. The most a reasonable person could handle is probably around 5 to 15, depending on how many hours you want to work and how frequently you want to update the content.
If webmaster has a proper team for different tasks, like writer etc. than he can work on many websites, but for single person its hard to manage more than 3 websites.
---------- Post added at 12:40 PM ---------- Previous post was at 12:36 PM ----------
ps. anyone watched this interview with Jennifer Manz? Interesting case to see what focus can do.
Jennifer Manz: From Parked Page to Profitable Business in 3 Months
There is no limit for a webmaster to handle the website for optimization as far as he doesn't feel weird Although the webmaster should have extensive knowledge and sufficient time to handle all those projects.