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"I built my own so can't really comment"

Great AndyN!

Almost any airbrush will work if you are going to do general spraying with minimal concern about how fine of a width you need to spray. You will also find you will need to make choices such as feed (gravity or siphon) and the type and brand of paint.

Cleaning the airbrush is quite important unless you only want to use it once or twice. Good maintenance includes disassembly, not just running a cleaner through it. Even a tiny dot of dried paint can foul it up. Not a hard task, but it needs to be done.

Most of these small airbrush compressors seem to be the same design. Just make sure it has a moisture trap. Usually run about 25-28 PSI.

You will probably get a hand full of accessories for it as well. Little squeeze bottles, cleaning jar, brushes, etc.

Paint: I recommend going with acrylic paints made for models. I use a lot of Tamiya paints and thinner. Pretty waterproof although I would not use it for the hull with constant contact with water (read "submersion").

So, here is what I use:
*Airbrush, "iwata Neo" moderately priced gravity feed. I have made a 3D printed handle to improve holding it.
*Compressor - "Zeny" 1/5 HP (Amazon ~ 100.00 US$). I added a shutoff valve on the output. I also have a Harbor Freight DG-10 air-gun to use with this compressor for cleaning models.
*Portable spray booth (Amazon) - I added extra filter materials for indoor spraying. Also see my video for adding LED lights to the booth. Lighting is very important.

I hope this answers your question.

I had a lot of fun painting the camo on my King Tiger tank. Added a link to that video as well.

Lew
Florida 😉, USA

Portable spray booth video:

https://youtu.be/8lZY6BXuiII?t=2

Any cheap airbrush from amazon would do. Many of them are just knock offs of iwata.
If you want an affordable quality I'd go for MR Hobby.
As for the comressor, I built my own so can't really comment.

Good luck sailor