Visitor Visa - B2

Good afternoon! I'm a 28yrs old woman. Filipina, working in Dubai as an Assistant. My pay isn't that big, but I won a singing competition which gave out 20,000 Dhs. I deposited half of it on my account in the Philippines (which I cannot withdraw until I return back there), and half of it will be spent on my planned trip. I'm planning to visit my cousins in Hawaii, and planning to do a little tour around the island. My uncle will be providing me with a place to stay. I'm planning to see Pearl Harbor, Missouri Memorial, Waikiki Beach.. and if possible see the Flowing Lave from a helicopter ride and do a rainforest and waterfall hiking. I have a 7yrs old son in the Philippines, and my whole family is there (My mom, sister and 84yrs old father). What are my chances to be granted a B2 Visa? If there's anyone, please help. Thanks a bunch.