Hi, I'm Beenish and I represent Vortex Global Services- www.vortexglobalservices.com. We are a team of expert HTML5, CSS3, Responsive web design developers and can convert all your 100 pages into responsive web design. We are comfortable with working on Tortoise SVN.
We estimate the project delivery time from 20-25 working days. Could you please provide us the url of your current site if any so that we can get an idea of your current website.
Thanks
Beenish