Not to be a Scott (you know cause hes a d*ck) but if you read your own link it says right there on the front page that its compatible with vista. ;P

Thats BS, been running Vista with UAC turned off since it was released and havent had any errors that were fixed by turning UAC back on.

Startup cost yes. But in the long run no. Plus total control over everything, and not having to worry about your webhost changing anything or their security over "your" server. I prefer to own my stuff not rent it even if it does cost me more money to start.

Run your own webserver.