You can see if you can afford a private beach because you will have to pay for it but it will be reserved for your wedding. No payment is required for public beach but you can’t keep other visitors away from your wedding area. So, decide if you can afford a private beach booking. Search for a private beach that doesn’t cost you anything. Maybe you are lucky enough to have something like that in your town or city.
Decide which date is suitable for your wedding and what time will the actual ceremony take place. Call a small group of people which include your first family, friends and some nearby neighbours; depends who you want to call. For a public beach, you should choose such a time when it is not populated.
Find some official authority who can allow you a permit for a wedding at a private beach or find someone who can actually arrange you a wedding platform at a public beach. It is not easy, trust me. Call around and check with people who can be associated with such activities.
Choose the wedding dress that both of you will wear on that day. It all depends on your liking. A simple sundress can help because it is cheap but yet impressive.
Invite everyone. Set up a stage with some flowers. Order two dish food at max. Save money.