If you have no money, you can begin zapping manually NOW with a simple 9 volt battery.
What you do is take small pieces of wet tissue paper and place them over your pointer fingers on both hands.
Place on finger on one post of the battery, and tap on the other post with your other finger as quick as you can for at least 3 minutes with a 20 minute break in between and repeat three times. This is exactly how the zapper works but you can do it manually on a 9 Volt battery until you buy your zapper which will do the work for you.
You can also find very cheap zappers I'm sure someone will send you a link.
Here is another method using a simple 9 Volt battery similar to the process I described on youtube: