Unfortunately there are no shortcuts to saving money. The best way to save money is by cutting out on all the little expenses that you may not think add up to much...
When you're playing at your gigs dring soft drinks or water instead of alcohol as they will be far cheaper, and think where you can save money everyday by doing things in a slightly different way... Making coffee/breakfast at home instead of buying it (actually all your meals) is another good way of doing it. [Really just cut out unnecessary expenses]
Setting a goal like you have done helps with this because then you look at the end goal and remember why you are making these sacrifices for...
Also looking at getting the gear you are after second hand. As it seems like you are starting out you won't be able to afford the hottest gear brand new, start with used items to improve your game and book those bigger gigs then upgrade over time.
Good luck!