100 high quality one-way backlinks in forum 05

I am running a web hosting coupon site. I would like the following to be done: Answer questions on good reputation forums, the home page of backlink should be at least PR4, the backlink page can be PR 0, when you answer the questions, you can refer to my perticular site URL or put my site url as the signature, I will provide you the anchor text and links. Totoally 100 postings, budget $100. if your answer is so good that is picked as the best answer(in [login to view URL], not all the sites has this feature) or it is set to sticky in forum, then I will count this as 2 postings, i.e, one posting counts as 2 postings. 1. Your answer should be meaningfully, relevant and answer the posting's question, no spamming, one line comment just saying something like "this is a great posting, I really appreciate this or benifit from this" does not count. 2. Target US, english site. 3. Backlink pages must be relevant to my page, prefer computer software, tech support, hardware, shopping discussion, coupon, deal etc topic. 4. Domains must be from different IP addresses and different Class-C IP addresses, i.e. you should not post 2 links in the same forum. if you are doing good, we can do this project again after couple months. 5. No more than 10 postings per day. 6. Prefer authoritative domains (.com/.net/.biz/.org/.us/.gov/.edu/) 7. ALL links must be DO-follow. 8. Every 3 days, provide a progress report, so I know you are in progress. I will setup 50% escrow when you accept the project, after you finish the work and I have verified it, I will release the 50% escrow, then setup another 50% escrow, wait for 2 weeks to make sure that all the links are still there, then release the escrow. Thanks -David