Bathroom getting torn out for mold remediation

Our landlord is finally dealing with a black mold issue in the bathroom of our duplex (long overdue). The contractor is starting next week and said the whole bathroom will be torn out, which means no running water or toilet in there for about 4 - 5 days.

It’s just me and my roommate, so we’re trying to figure out the logistics. Showering at the gym is doable, but the toilet situation is the bigger problem. We do have a small backyard, so I started wondering if something temporary could work.

For anyone who’s been through a renovation that took out their only bathroom, what did you do? Is it unreasonable to ask the landlord about something like a porta-potty rental for a few days, or do people usually find another workaround?