Hello,
Why are you against opensource software? What features do you need in your live chat? (you can find those features better implemented than i could doin 5 days in OS projects)
Hi, we at on2itonline would love to work for you on this project, we do "full service" websites on a clear and fixed budget. We have lots to offer that others don't , like our lifetime FREE hosting on every website for a start.
Please check PMB for more details.