Renting: NWO Silver Key

Use this key to start the final 10k kill mission in prison when you start. This lets you double up on kills as all your tier 1,2,etc... mission kills count toward it instead of having to do it in addition afterwords.

This also allows you to leave prison and come and go with no penalties. (normally you get a 300 kill mission penalty each time you leave)

200ped rental
2k collateral