How many secondaries did you submit? Are there some schools you have a very high chance at on your list?
I have been in grad school abroad for a year and will continue to do so until next summer, but I only applied to schools in my state (3 schools) and tailored my application very specifically for those schools. I'm very confident I will get interviews at 2/3 of them (got one so far), the third is a toss-up. Which means I'm coming back for a max of 3 interviews. Point is if you are abroad and not extremely wealthy you need to be very choosy with your interviews. Would have been better if you could have set your application up that way, but I would recommend picking a few schools that you are very competitive at to return to interviews for, should you be invited.
Is what you are going abroad for a serious part of your eventual career path? If it's just "a job" or an adventure, you don't have a lot of money, and you want to get in to med school this year, maybe reconsider. But none of us have all of your details--maybe this job is paying well enough that you will do better financially to take it and dish out the extra money for interviews?
Things to think about regarding traveling back for interviews specifically:
-set up some sort of miles reward program/credit card.
-make sure you are able to take the time off from your job, depending where you are coming from this may be as much as 3 business days per interview (and that's assuming the interview falls on a monday or friday and you can use the weekend for travel).
-make sure to send "in the area" emails or phone calls for schools that are near to each other. I think this is appropriate especially for students coming from abroad.
-plan around jet lag, try to arrive a couple days before your interview if at all possible. If you are coming from europe/africa/mid east this might be less of a big deal, I've always found it easier to adjust coming back to the states than heading this direction. Obviously coming from south america should be even easier. (although that 30-minute Hugo Chavez timezone offset coming from Venezuela can be brutal, let me tell ya.)
-I really like skyscanner.com, geziko, and if those fail, kayak for finding flights.
Would you mind telling us where you are headed?