Yes, you can include a short-term element in a remodel. Then when the need for the short-term element is past, you simply rip out the temporary portion. A good example might be finishing an attic to create extra bedrooms for teenagers. At the time of the remodel, you might need two bedrooms and a bathroom. The temporary or short-term element might be two walls that separate and define the two bedrooms. Your plan might be that in four years, when the teenagers to to college, you will remove the two temporary walls and convert the space to a large guest suite or inlaw-suite.