We all have different ideas on what we think is best for a compressor. Why not spend $300 if you can make it work or go to $3500 if that is what you want to do. To me, it is about how much your Airguns cost. I personally tried going to the dive shop, finally decided to get my own compressor. Looked at the Alkin, thought too expensive and it is a larger machine. Does not matter whether horizontal or vertical, they are big. Settled on the Coltri. Mine worked great for about 9 months. First the pump went, under warranty, then the electric motor, under warranty. It disappeared being shipped back to me. Fully refunded, sold a gun, and I now have an Alkin.
My comparison between the two. Loved the Coltri. Small, pretty dang quiet, filled my great white no problem. I do miss the Coltri. Now the Alkin. What a machine. It is a beast. Yes it is bigger, I do have the vertical one. Love the wheels on it. It is louder than the Coltri, but what a machine. It is twice as fast as the Coltri, very easy to service and just flat ass works.
I have two Impacts, with scopes and accessories they are easily $3500 rifles each. This does not include the FX’s bought and sold. I shoot at least once a week. I do run the compressor a 1/2 hr each week. I do change the oil, not by the hour meter, but by the time recommended, 6 months. The Alkin is way more machine than I need, but I have great confidence in it and with the shop on the east coast parts etc are readily available. With all that said, I wish for me the Coltri would have held up. I did like that machine, the Alkin is definitely better.
With all that said, just a $500 PCP, shooting occasionally, and you want a compressor. I see nothing wrong with something that is cost comparable to the gun. Yes it will need work, but yes it will work also.
Have fun shooting!