The nearest to Wokingham would be Simon Knapp at Scott Dunns, he is an experienced vet with a good eye. You'd need to call them about prices but I would guess around £250 for 5 stage.
I ended up with a 2 stage plus but vet only charged me for the 2 stage, i think including call out just under £200 also included bloods.
As Scott Dunns are probably the most local, hopefully the call out won't be too much so would guess £250
You also need to ask which the owner uses as it's better not to use the same vets. Some vet practices are happy to vet horses that are already clients, depends on the vets.