I put one on a hot water skid, cost me 59.99 here:
Heartland America: Crime Stopper Remote Start RS-1505DP
took all of 1 hour to install and works great. It has a range of almost 100 yards in the clear and works through a concrete wall as well. 2 remotes . I cheated a little and used a cheap high gain antenna and mounted it to the top of the box truck to increase the range but it has been flawless for almost a year now.