Hi please advice how much is the average budget (CNY) that we should have with us..

Good day! We're coming from the Philippines & currently working for our visa there. We'll land in Hongkong & plan to make a sidetrip to both WOW & Happy Valley on our 2nd day-Oct 30, 2013 in Shenzhen. is this possible for 1 whole day? Likewise is there a need to book tickets in advance or we can purchase them directly upon arrival? Do both theme parks accept credit cards in their souvenir shops & food outlets inside the park? Can we bring food & bottled mineral water inside both parks.? We plan to see WOW first then the Valley, is it near WOW, if so,
approx distance like if we can reach it just walking or if we have to take a ride? What is the weather there please advice if we need to bring coats/jackets in case it's cold there... Please advice as we want our visit there to be a memorable experience & fun too...many thanks & more power!