The number of nights does not matter. The number of rooms does not matter either. Every stay and Balloon has equal value so as long as the host and you are happy it’s not important where and for how long you stay.
Do all stays have equal value?
Yes. Every stay and Balloon has equal value. The duration of your stay, and the size and value of your home are not important. To put it simply 1 Balloon = 1 Exchange.