If you want to run it successfully and on a large scale, of course you have to put in more effort yourself first. The taboo in holding an event is to pay for it yourself. It is best to ask all participating teams to come up with some money and then use the money as a donation. Their rewards include buying water to make photo frames, etc. For photography issues, you can find some friends who are interested in photography. You can help borrow a camera. It is best if you have a camera yourself. I wish you success