I would recommend an industrial grade vinyl of the type used in hospitals.
http://www.bbriefings.com/pdf/747/hosp041_burns.pdf There is an aluminum oxide finish available for use on recoats. It's called Trek Plus
http://www.ambassador.biz.ua/eng/trekpluse.php
While it is said to be more durable, mopping and bleaching of wood floors will cause them to cup and warp eventually. Annual recoats will be expensive and inconvenient. Ceramic tile is durable and moisture resistant but I think the grout would be difficult to keep clean. Sheet vinyl is the floor of choice in your situation.