I'm in the north of Thailand now and according some websites there is a sensible difference in prices between the north and south of Thailand. My budget is a bit tight so I would like to know which are the prices for some basic thinks in the south so I can compare and know how many days I can stay there.

For example, in the north of Thailand, you can:

• have a pad-thai from 35 bahts
• sleep in a hostel from 100 bahts (bed in a shared room)
• get a thai massage from 150 bahts
• rent a motorbike from 150 bahts

Which are the equivalents in the south? (for example, in Ao Nang, Koh Samui, Phuket, Koh Phi Phi...)