240v doesn't save any money, its the same cost. although what you are asking for (a timer being wired to feed 120v circuits from a 240v lead) can be done, it wont save you any money, as you will basically be using the seperate legs of 2 120v circuits in an unsafe manner. (unless you run all new 4 conductor feeds to the timer box, or are lucky enough to have them close by)

__________________
Motivation: Its not that I'm lazy, its that I just dont care.