Potentially relocating to accra, Advice please (Accra)

Hi All, potentially relocating to Accra, busy negotiating an offer from my potential employer and need to cater for international schooling for 3 young children, 1 is in nursery and the other two at primary school level, does anyone have any idea of roughly what the tuition would be at a UK standard school? Appreciate any help, additionally will need medical cover and if there are any additional costs I'd appreciate the heads up. Just want to make sure my family is sorted