I'd be fast asleep by midnight nibbles, but the other three would be OK. You might want to put this detail in the RB so the SP knows what she has to provide for the money - basically 3 shags for £300.
tcm
I always detail my RB's to outline my minimum needs including;
DFK
OWO
Reverse Oral
and that I do not usually have the stamina for all night sessions.
Despite the price there are usually plenty of offers, some way off base for services required, some asking for silly (IMO) money, some not my type of lady but usually four or five bids worth contemplating.
Often the best offers come from a girl some distance away, this requires a check on her geographical skills, once it is confirmed that she knows where Cardiff is then it gets down to the detailed choosing and planning.
As I have said before, I often find that the girl is using the funds from my RB to cover the costs of a Cardiff tour and will stay in town for two or three days before or after.