You will need
$10 to $20 1/4" shank router bits for cutting
$50 shop vac to clean up the dust
$100 worth of lumber and plywood to make the frame
$190 ridged router
$100 windows/mac/Linux computer
so figure another $300 to $400.
Many people already have a computer they can use.
Many hours learning software
see this thread for a more comprehensive list that includes safety items like fire extinguishers
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