Well I have only completed the en suite myself and removal of all ( inc partially tile) tray etc and all new inc tray and digital power shower ( so more electrics work ) fully tiled and refitted cost me 4k on the button. That was sourcing all products etc myself and paying for direct labour. I would also shop around there are some great half price deals on atm
Tiles are costing me E700 and labour for floor and wals tiles E400 so total cost would be E4000 for bathroom, the same as yourself, doubt if I would get it much cheaper. My plumber is around years and very reputable.