if you are in the market, you need to be better informed. the vadis system, which is soon to be replaced, runs about 20k for the tool, dvds and yearly subscription. not for the faint of heart. i don't think leasing is an option. there are other alternatives, but they pale somewhat to the real vadis. plus, the vadis is known for going down or taking 3, 4, or 5 times to get a download into a car. it is not well liked nor respected in the dealer or the aftermarket. but if you are going to be doing more than oil changes and brake work on the 99 up cars, you need to get 1. lotsa parts on those cars don't plug and play.

https://www.volvotechinfo.com/index.cfm?fuseaction=VIRAinfo.viewVADIS

here's the link. good luck, chuck.