Antergos is free. You can download it and make as many copies as you want. All you have to do is download the iso image, burn it on a CD/DVD or write it to a USB and enjoy.
The recommended methods for creating a Live USB of Antergos are listed on our wiki. See: HOW TO: Create a working Live USB
A new stable ISO will be available soon. In the mean time you can try our testing images if you like. You can find them on our Build Server.