Are there any alternatives to promote my invention?

What can I do to get my invention made and marketed if I can not afford 800 bucks for invent help and then 10 to 15 thousand bucks for the design? What can I do for free or a few hundred dollars? It is not a complex design or item honestly its really simple ( for anyone who can make things such as a doorbell or a... show more What can I do to get my invention made and marketed if I can not afford 800 bucks for invent help and then 10 to 15 thousand bucks for the design? What can I do for free or a few hundred dollars? It is not a complex design or item honestly its really simple ( for anyone who can make things such as a doorbell or a fire detector.)
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