Realistically, how does the abandoned air strip earn money?

After beating the air strip missions, the place becomes one of CJ's assets.

Have you ever thought about how it earns money tho?

I mean, the place is abandoned, there's nothing to do there. Not like you can start a business there. Unless, CJ starts selling airplane parts? Another possibility is junking planes and copters? Similar to junk yards for cars, idk how that how that works lmao.