Even if you have no idea when you're going to be making the move, you can certainly go ahead and complete the first step - the microchipping. Once you've done that, you'll need to schedule a rabies vaccination ... and 21 days after the vaccination is given, you can go ahead and have your vet draw a blood sample to send off to Kansas to be tested.
Most of us who've been through the procedure have run out of time before moving or have moved right at the end of the 6-month waiting period, rather than having extra time to spare.
Ok, I think Meg is on the right track... Do go ahead and microchip your pet. Do give a rabies vaccine after microchipping (can be the same appt, so long as they're in that order). You have to wait a minimum of 6 months after the blood is drawn for the blood test before moving your pet.
If you download the Fact sheet (#4) off of
this page, you'll see under "the 6 month rule" that "Your pet requires only one blood test and 6 calender month wait provided all subsequent rabies booster vaccinations are given by the required date".
So, I would go ahead and chip your pet, vaccinate your pet, get the blood draw done and sent off. As long as you keep giving your pet rabies vaccinations before the current one expires, you can take as long as you need to find a job. As long as you document it well, there's no such thing as too early.
Do note, however, that you will want to have your vet note the microchip number on EVERY rabies certificate if she needs another shot before going.
Also note that the 3rd country vet form you'll eventually have to fill out is only valid for 4 months once signed, so don't start preemptively filling it out, because you'll just have to start all over again.
Best wishes.