Revamping Website

I would like to carry out some changes on my website http://www.paperwritingsupport.com. There are some minor issues which I need to resolve, in order to ensure a seamless user experience on the website. Some of the changes are as follows: 1. The customers should be able to easily signup, without going through the lengthy order form. However, the order form+signup should also remain as it is. 2. Customers should be able to place new orders from their own accounts after they signup, instead of filling up a lengthy personal information form again. 3. The contact form needs to be fixed. 4. We want a live chat to be installed on the website as well. Please let me know an approximate cost of doing the above work. Looking forward to the bids. Only highly experienced freelancers will be considered.