When searching for a two-flat, make sure you are in tuned to your local market. The only way to do this is to go out and look at properties and monitor them. You might try selecting a few properties online, then doing drive by’s. Notice when they go on the market and how long they last before getting under contract. Even before you start looking you can test this out to see about how long you will have before you can make a decision when you are ready. Depending on the aggressiveness of buyers and investors you can gauge how fast you will need to make offers.