Some people are completely capable of organizing their own event here in Israel. Maybe you are one of them: you have the time, the contacts and the skills to do it.
You can get numbers and recommendations of vendors from your friends who already did events in Israel, and you will find in Google, Pinterest and Instagram a great deal of creative ideas and crafts for all kind of event.
Nevertheless, it still very recommended to select someone who will help you, if not to plan and choose everything, to help you with you big Day.