The idea behind local online marketing is to sell your product or service without spending money on advertising. You basically let the client come to you and pay for the product. Now, for the local online marketing to work, you need to know exactly what the clients expect from the product, where it will sell the best and what would be a price that anyone can afford but is not too low either. If you already know all that, you can move on and start creating the perfect campaign. If you do not know these details, you should get informed about them and start putting them head to head to create a perfect local online marketing process. The product will not sell if you try to sell to the wrong people, if you do not advertise it properly and all those things. For example, you can not start selling Ferraris in the poorest part of the country, you will not sell one of them. You need to find the cheapest cars, maybe even second hand. Now, you understand what I am talking about. Local online marketing also means that you and your offer need to be adaptable.
Local marketing is something that you can do on your own without any outside help and that is why I think you can really save a lot of money. If you already have an internet website, you can already start adjusting minor details and adding or deleting parts that are not actually meant to be there for your next campaign. I can not be specific about anything, but you probably know what you need to do.
Attracting a crowd that is too large will create dissension between possible buyers and you do not want them to start discussing among them before they pay for the product, you want them to pay later.