Your Realtor needs to communicate with the selling agent, get an extension signed for the middle of May, the appraisal should still come through the underwriters will need this information to process the loan. This pressure should be taken off of you and put on your agents to gather appropriate documentation for the closing in May. Power of Attorney may be a way of life for the young couple in the military, once again I strongly recommend the agents step up on that issue as well. Our wonderful military families have much stress on them the anxiety of moving at a time when your spouse is deployed can be overwhelming. This is why it's so important to use a Realtor there is much more to a sales offer than just the standard purchase offer agreement. Please remember buying or selling is an emotional and stressful time in everyones life so take a deep breathe and rely on your Realtor. I wish both parties well.