it really depends on your usage on how well a cheap setup will work for you and what you consider alot of fills .. im a 'casual' shooter and a cheap co.pressor works for me, i dont even leave it set up .. i fill a bottle and can draw off of it for several weeks mutiple small caliber guns, sighting them in, alittle plinking on days off from work etc ... now if you shoot every day, 5+ tins a week, go to a range all day, with larger caliber guns yeah that could be an issue with a cheap compressor in the long run ... but my setup like i was saying, shooting a 177, a prod, a .22 here and there without looking at a calc, i get prolly 40+ fills off a '3liter' tank and o ly need to get the compressor out every few weeks .. if i had a .50 now and shot it everyday forget it lol ...