Why use epoxy grout? loads of Pros and Cons about using epoxy
Use powder grout and have no worries about cracks in the tile etc.
Cementitious grouts have been used for centuries without issues
All it needs is periodically maintenance, once a year
2000 years old Roman mosaic floors from the Villa Adriana, Tivoli, Italy. Romans could tile back then.
11 guest rooms, each one has a different design.