no one can estimate, alexa ranking is depends on your competitor/other website too, when other are getting more traffic, your ranking will down. And alexa ranking depend on the visitor with alexa tool bar only, it is not accurate enough
I don't really know why people are still so stressed about getting a good position in Alexa. Considering that the Alexa rank is based only on the Alexa's toolbar users, I wouldn't even bother myself to be ranked... unavoidable, I know Focus on G, backlinks, content... not Alexa
Alexa rank is affected by users who use Alexa Toolbar. Most webmasters uses this kind of plugins to measures Google PR and Alexa rank so they affect this rank significantly. I can give you two examples: one of my websites got 1000u/v a day in entertainment niche and alexa is 1.5mil Second website is in SEO niche and has 500-600 u/v a day and alexa rank is 17 000. So now back to the the point: it depends on your niche and nature of your visitors
They are regularly updated blogs. I try to update them each 2-3 days with at least one good quality article that is written by experienced ghost writers. They also add visual materials and/or videos
There is no set traffic with Alexa, as the rankings can change, it just depends on who is ranking well for the last month
I know the alexa toolbar needs to be on your visitor's site to affect your score. Does it also matter if it is a unique visitor or returning anyone know?