Exactly this. My first boats tiled bathroom floor needed replacing (loose and cracked) obviously the floor was tiled before the furniture was fitted. Took the best part of 4days to remove the cassette toilet and chip away the tiles around the furniture and shower tray. Prepare the floor. Lay new tiles having to make cardboard templates to go around the existing furniture. Then refit the toilet. Total floor area was no more than 1 1/2 square metres. If I was to charge a customer a flat rate per square meter I would be seriously out of pocket. On the plus side having the cassette toilet temperly placed in the gallery while doing the job made a change of view quite good, provided I rememberd to make shure the curtains were closed😁