How about I teach you to install it yourself? That's why I put 3 days in the time box.
I have setup and maintain multiple twiki's in unix and windows environments, with special focus on unix enviros.
With my bid I will include the setup time I anticipate needing, plus 2 hours of custom support or further customization (skins, plugins are a must!). Or you could just take 5 hours of personal coaching after which you can install the basics and plugins too - that's what I'd prefer if I were you. Either way, have fun with twiki - it's great.