Can a flushing portable toilet handle daily use in a November 2026 office remodel?

We're starting a six-week office remodel in November 2026 with 25 employees and clients on-site daily. I'm considering a flushing portable toilet for better comfort and hygiene indoors, but I'm concerned about winter performance. The unit would be placed on a concrete floor, and a service truck can park right outside the building. I've used standard units on outdoor jobs, but this is different, we need something that feels clean and professional. Should I go with a flushing unit, or would a deluxe portable toilet with non-flushing features suffice? Also, how does cold weather affect the fresh water tank and waste system in a flushing model?