I am thinking that may be a bit too many. I would go with 3 blogs max. That should cover enough niches that you should be able to get by. Plus you need to remember that you need to handle all of these blogs. You need to update them with posts, market them, change up themes, SEO, etc. That is a lot of work to do on 10 blogs!
As per my thinking it's good if you just create only one blog and work regularly and also try to post quality, unique content so that your blog could make place in top rankings..
can you maintain properly those 100 blogs, this is the question you should ask yourself. if yes? then see nowhere anf go for it, it will be great for sure. IMO
I agree. It would be impossible unless you have 50 people working full time to get it done. And that doesn't even seem logical. A few is more then enough and even though you almost have to work full time to support them. The other idea is instead of creating blogs you create mini niche websites. You could create a 100 of those over time. That is actually what I am doing. I am creating a bunch of mini niche websites one at at time while maintaining my blog. What happens is once the mini niche website is completed you let it site and watch it slowly big traffic and an income. Try that out!