The 2901 is only $79.95
The Tip Kit $39.95
Be advised that you cannot simply get a HVLP Gun like the one you show. You need a regulator at the Gun....A water / Rust Filter (at the Tank Outlet)...Rubber Hose (Plastic will sweat and produce Water)
The compressor must be able to produce a steady, uninterrupted and totally consistently "dry" air supply at a steady pressure. You have to get both the Fluid Feed and Air Feed Knobs on the Gun set correctly.
It takes all those components working correctly to allow you to produce a smooth, blemish free surface...one with no "Fish Eyes" (tiny water droplets).
There is a very good reason I switched from using a $700.00 Tank Fed HVLP Rig with all the trimmings. It was (...and still is...) a PITA enough when you are stationary....have to move it all from place to place and it becomes intolerably a PITA.
A GOOD HVLP Gun is one that will produce a smooth, consistent flow of well atomized Paint, with little to no over spray....and is lightweight and easy to master and clean. And inexpensive.
In other words.....the HV-2901
The only "less expensive" other choices are Electric Siphon HVLP Guns that have the Turbine built into the Gun itself, and that have the Cup attached to the Bottom
The one I linked to has a 1.2 mm Brass Nozzle, and is a "Prime" purchase so if it comes bogus, it is still an easy return.
I see you added some others. The Home Right is produced / sold by Wagner. Of the two you show, that would be the one if you find my other choice to be wanting.