Never been asked and I've been going there for over 20 years etc and lived there for 10 years or more ..but I'd say have at least 20 k bht with you it's not alote any way aprox £450 .. just I case
I overstayed by 4 days .not my fault it was airline ..but I had no probs .just paid overstay at airport..and asked do I have blackmarl now .he said no nothing no problem ..so you will be ok