Honestly, I'm not completely sure how I made so many hubs in such a short time! However I have a wide range of interests as well as a fast typing speed. I'm also a bit OCD about order (if you haven't noticed the numerical and dot point lists in my hubs!)
The average hub takes me about 30 minutes total. However I often have several windows open and may come back to a particular hub 3 times before I publish it - to add something I forgot or polish it.
I try and make a capsule for each different subtopic in each hub so that I (and readers) can easily find information within the hub.
If you need some ideas, I'd recommend reading my How to Hubstorm & Quick guide to hubpages hubs.
Wish you well!