Ranking For Thousands of Pages

I built 9 pages a week ago on this extablished domain with pr1 and i was able to rank almost all of them by merely using onpage SEO. Assuming I choose the same super low competition keywords, will i be able to rank 10,000 pages or will the Page Rank from the home page just thin out far too much to rank all of them the same way?

I think it depends on the keywords. Depending on what they are you can get them to rank. What keyword research tool do you use?

i used a mix of wordtracker and adwords. These are all super low traffic and long tail . I also checked some of these phrases in quotes and they are all like either zero to 1000 max results in quotes in google. Most of them are less then 10 results in quotes.

What do you mean will the homepage thin out? If you're ranking solely on on-site SEO then it shouldn't matter how many you create.

i figured the reason the pages rank somewhat is because they have some PR which is passed on from the homepage since i'm linking all the sub pages from the homepage. So far I only had like 10 pages but if i had 10,000 that PR2 homepage will pass PR divided by 10,000 right? Well, i can't just throw up a new domain and rank for long tail words the same day they are indexed. Are you guys able to do that? Infact I just build some new pages for the same site, they got indexed right away but they are not ranking anywhere and PR on the pages is NA.
I only want the pages to rank not the homepage.

You will have problems indexing 10,000 pages. You have to convice google (backlinks) to index all of them - and putting links to all 10k pages on your homepage is not a good solution.

so how do people get 100k or millions of pages indexed like many whitehat sites?

Their sites are authority sites.