3-5 months with 3 really professional developers, with all the experiences needed for develop. So no research, just dev.

1. absolutely 2. We use Pushok SVN (based on Tortoise), which provides SCC. The integration with VS is fine. For compare, the Beyond Compare is the finest. 3. Use command line. IMHO

Don't afraid of develop your own solution. At my previos company, we made a custom tool. It took a month for one professional. It's between Team Manager and Project, but we could use as many licences as we want, and no exchange server needed :). My current company use Mantis, a http based bug (task) tracking tool. Janos Lerch Softic Ltd.