Thanksgiving. If you prepped ahead, you could cook everything at once without any sticky notes reserving oven space. We'd break it down to one for
Bacon-Wrapped Potatoes with Queso Blanco Dip
Skillet Cookies, All The Time. Keep the ovens hot and the goodies rotating.
World's Slowest Microwave. Set it to 180 degrees and let that pizza slowly (and perfectly) reheat. While your lunch crisps up, let each of your family members get their food warming in his or her personal oven.
Warming Station. Pretty sure this would go against Airbnb's policy, but having five ovens would allow you to let the neighbors, the neighbors' neighbors, and the neighbors' neighbors' neighbors pop in to heat up their casseroles in the event of a power outage. What? This place has a full AV room; you think it doesn't have a generator?