I got the Benjamin/crosman hand pump to fill a Maximus. I recommend that rifle as a great pcp entry point, and the hand pump does fill it - with about 100-110 slow strokes. I have got 3/8 inch groups at 10 yards, no tuning, just a great buy for an accurate rifle. For the bigger capacity rifles (aka Sam Yang offerings) a powered pump is preferred - when do you want to do 530 strokes to fill the tanks? Never, by my call.
I bought a Yong Heng high pressure compressor for approx $400 including shipping handling and import duties. That is noisy, has an external water pump, and overall is a loud pain in the butt to listen to - but about minute and a half can fill those dual tanks to 3000 psi. Sumatra in .22 , creepy peep sights, but again dead on at 10 yards, everything goes into the 10 ring or the X. A windy day, and still within an inch at 25. So here's the link for the pump, Chinese manufacture but well made overall : https://www.aliexpress.com/item/110V-220V-300BAR-30MPA-4500PSI-High-Pressure-Air-Pump-Electrical-mini-Air-Compressor-for-airgun-scuba/32723665015.html but you must specify the voltage. I suppose a small tank for carry along recharge might be a good thing but at $600 that becomes a bit pricey. Where I shoot I have electrics so no big deal. Hand pumping works fine but takes a while - this old guy needs the exercise (not).