You might be thinking, well if you move your office to the guest room, won't the kitchen go to waste? One of the reasons, aside from the fact that I don't cook (I can, but choose not to), is that there is virtually NO counter space. My current desk is actually a five-foot long stainless steel commercial prep counter. I am using a barstool as a chair, which after a little while isn't terribly comfortable. So moving the computer, printer and all associated technology will free up the counter space for other things, like prep work and cooking.
I've gotten some excellent suggestions. My limitation, as I mentioned to Cote de Texas, is that to get anything upstairs in my house is a major chore and I usually have to hire someone to help. So, for the time-being, I got a top and legs from Ikea. It's a quick fix, so I can get back to having a functional kitchen. As they say, you've got to live in your house for a while and then decide how things should work.