Business startup

I'm afraid I only know product manufacturing. If you have what you believe to be a viable product but not enough money to develop it then reach out to someone who has the money. If that someone believes in your product then join together, develop the product, build and test the product then test market the product to get customer feedback. Under no circumstances try to bootstrap, that is to take orders for the product, get a down payment and try to build the product with that money. If you try that you'll fall behind and never catch up. If you can't find a partner who believes in your product then possibly the product is not commercially viable.