Welcome.Beside having a machine,you will have to generate the program to make it do the lettering and you can learn to use it while researching machines or building one yourself.I have been getting to grips with F-engrave for the purpose and it will cope with any true type font-which helps a lot.

To begin your search you really need to define the work area you really want.Or measure what will fit in your workshop space.For what its worth,I built an MDF machine with a work envelope of about 350mmX240MMX28mm for about what a good 1/2 inch router costs-including an ebay computer and software. it took a while though and I had years of CNC experience when I started.