As far as my experience is concerned upon entering doha i don't remember anything that i was asked for a show money though i also enter doha on a tourist visa alone. Show money depends on what country you were departing from. If you are departing from the Philippines alone, show money would be 1,4k dollar but upon arrival at doha airport there is no show many required.. just show passport. :-) But there is a tricky part when you are departing from the Philippines, there will be two airports, Cebu and Manila. In Cebu they really require all tourist entering doha with a show money of 1,4K dollar and Manila - my friend departing from Manila wasn't asked for a show money at all but he was ready for a show money just in case the same amount i have in Cebu. For families i don't know how much show money they need, i assume they need 1,5K dollar each.