What you are painting is irrelevant, not all brushes are created equal. As strange as it sounds you will get on better with a cheapy once you’ve had a ‘decent brush’ and learn how airbrush should behave - consistently, what signs to look for when the brush is starting to clog, and again the symptoms will be consistent.
Ultimately the brush you next buy should be bombproof while you’re learning.
The Iwata Eclipse HP-C is a tried and true workhorse.
I’ll let the lure makers advise what brush they’ve found works for them.
On the upside if you are declaring an income from your rods & lures then this would come under ‘tool of trade’ and become a tax deduction, as would your paints & spare parts, compressor etc.