For the price... it all depends one what equipment you want to use....
You can get HID projectors anywhere from $50-$250 on Ebay (depending on Quality), and if you just want to use an HID Kit from ebay (D2R bulbs/Ballast/Wiring) that can be like $100 for the cheapest. ((But remember those probably wont last long!)) Then the Chromed shroud and Bezel is $120 from http://www.IZNTRBL.com (which is AWESOME).
So if you go the cheapest route possible you it will be roughly $270.
I would recommend using only OEM Equipment for their Longevity and preformance. The best ballast and bulbs are Philips. From HIDPLANET.COM you can get Brand new Philips Ballasts, Bulbs, Ballast Covers/Mounts, and Ballast Connectors for $379.99. Again that is Brand New, and there is always other places to shop around for the stuff. A lot of people even buy used Equipment to save money. Used OEM stuff is atleast 80% of the time still really good stuff and will last you a good amound of time.
For a Time for the build....
plan on 1 day to mount the projectors
Josh can vacuum form the shrouds in one day and ship them to the chromer the very next day. The chromer is pretty quick about getting things done. so from the time you ship to the time you get it back will probably be about 3 weeks.
But you can also make your own shroud and bezels using various materials and products anywhere from a $2.00 Oven Drip Pan with a $2.00 Ace Hardware Flange. If you go this route you can have the whole thing done in two days.