although I don't own this specific book, the gingery books I have are pretty great. https://gingerybookstore.com/InjectionMoldingMachine.html
if you've got time and space, you can do way cheaper than $10k. You need a drill press and a metal lathe. If you're feeling ambitious, there are other books that will show you how to build a drill press and metal lathe.
Really depends on how committed you are to bootstrapping and saving nickels.
Yes! I've seen several machines on Youtube that's either built from this book or pretty close to that design. You could definitely make a fully automated DIY machine at home for less than $3k no problem.
Really depends on how committed you are to bootstrapping and saving nickels.