Just started getting into it this season myself. Was sick of buying calls to do certain things with different volume and not happy with the results. Decided to just make them to my specifications. Most of the above is the short version of the costs. When you start getting into it, the little things really start to add up. Plan on a grand as a safe bet.
Drill bits (that's an expensive one cause you want quality especially when drilling acrylic inserts), chucks, CA and other finishes, reeds, call bands, blanks (acrylic/wood), lots of sacd paper at different grits, insert jig (or block of aluminum to make your own, etc.
Then you have the big stuff like lathe, drill press, lathe chisels, Dremel tool for touch up work, even wood for a separate work bench. $$$$$, but all worth it in the end. You will second guess your self at first, but once you are making your own calls and you can use the fruits of your labor, it is all worth it. Plus if you know calls and can actually turn one, you can start by selling a few on Craigslist,com and get some or all of that money back. Revisit it when you have some extra cash to use.