I have had pellet rifles all of my life. Bought a RWS Chineese knock off last year (springer) and was like “meh”, liked the concept of PCP, but the cost, scuba tanks, compressors, just turned me off. Not sure how I missed it, but Umarex has come out (last year) with a PCP that uses disposable cylinders - yes, not cheap to shoot at $12 for 45ish shots, but you can store it charged - for a person that sights it in and stick it in a corner for backyard varmits - excellent rifle. Dime size groups at 50 yards, close to 900fps, quiet! $200 on Amazon
You could own this for what a tax stamp costs on a .22LR