I am amazed. Debbie's comment is not only accurate in my humble opinion, but moreso given that she is a real estate agent with a vested interest in selling. So here is my more detailed answer:
Don't buy a co-op now, especially if you don't plan on living in it. Co-ops are notoriously difficult to rent out, even in Queens, but made worse by the fact that you will be an absentee landlord in a city that favors renters. Also, many co-op boards restrict how long the unit can be rented, or after how long a period of time must pass before it can be rented, or charge a rental fee in addition to the maintenance simply to get in on the action, or require getting board approval for renters, or in the worse situation, a combination of any or all of the above.
If you want to rent it out, you are better off going with a condo. But although Bloomberg is expecting like 1 Million more people in the next ten years with many going to the outer boros like Queens, there are many new buildings coming on the market particularily in LIC and Astoria to alleviate some of that demand. But in Queens, there will always be co-ops and condos available, and not at the slobber prices of Manhatten., so you are better off waiting.
Lastly, it is notoriously difficult to make even positive cash flow when buying a rental property in NYC, and it is even more difficult when you won't live here and have no control over the maintenance- which always goes up. Unlike other areas, where renting and buying might be comparable monthly payments, here in NYC people often pay at least a 15% premium to own rather than rent. So for example, your co-op that you would need to rent out at 1400 to cover its costs has a good chance of having a FMV of 1200 rental. And what are the chances that you stumble accross one that works out, not being here, not knowing the nabes, and not knowing the sellers?
Wait it out- Queens co-ops/condos will not go through the roof in 3 years. Save your money and avoid the stress, then come and enjoy our great city. We will be waiting for you.