I don't make mods or atomizers or anything, but i have a wealth of experience making stainless, titanium and Inconel tubes and fittings for aircraft engines that are actually quite similar. I know, with 100% certainty, the longer you can leave a job set up on a machine, the more productive you will be.
Here's an example, looking at an average atomizer. You've got a deck/base, chimney, top cap, drip tip, tank, say maybe 5 parts depending on the design. Using a small cnc lathe with a decent array of tooling (mostly tiny borign bars for this application) you're looking at anywhere from an hour or 2 to maybe 4 hours on the outside to cut blanks, get a part set up and running, and then looking at running maybe 50 parts for the rest of the day. So you make the parts for 50 attys in a week, spend saturday deburring cleaning, assembling and packaging them all, and after a 50 hour work week, you've got 50 attys made.
Now, say you leave those parts set up for a whole week on the machine. You're looking at making about 450 parts in your 5 day work week. In 6 weeks, you'll do a 450 piece run of your atomizer, cleaned, deburred, packaged, the whole deal, right from bar stock to finished product. That's 75 units per week, and you didn't have to work saturday. The rub is that you had to work for 6 weeks with no cash flow, and I get how that can be hard. I've also seen machine shops run themselves into the ground by refusing to spend a little more cash upfront to be a little more productive in the long run.