How to plan destination wedding without spending a fortune

My partner and I recently got engaged. We’re wanting to do an intimate wedding abroad with close family and friends. It won’t be super small as our families are fairly big so looking around 100 guests. We would love to consider Egypt, Morocco and turkey but open to other places such as Spain, Portugal and Greece if the price is right. I am confused on where to start and how to negotiate a good *local* price. Anyone have any experience, advice/ recommendations to share..