Booking ticket to Vang Vieng

The initerary is still has some details that need to be updated. I tried to book ticket to Vang Vieng but I couldn't call the bus, so maybe I'll try again tomorrow. Meanwhile I booked a bed in an eight-bed dorm in Vang Vieng so at least I will have a place to sleep when I arrive there. The bed costs me only 247k VND for two nights and that's acceptable price. I think I will book a bed in Vientine later when I am in Vang Vieng, so that the time could be more flexible. I will spend a million VND per day for food and sight seeing, and the number could be changed if there is a special thing out there. For example, I really want to take a balloons ride which costs me $90 (maybe $80 if I could negotiate in some way). So it is a whole two days budget just for one ride, but it worth the try and it's relatively cheaper than other places. The rooms would cost me 500k VND more, and I basically spend 2 millions VND on bus tickets and beds. The food takes me one million more, so if I take the balloons ride, then I have to prepare about six millions in total.