Define inexpensive....
These cylinders are inexpensive....~$26
https://www.amazon.com/Size-Matters-Cyl ... 28&sr=8-10And come in common sizes....1.75" diameter, 2" and 2.25". They are tapered though....and if you prefer a straight walled one, then LeLuv brand at Amazon are slightly more expensive at around $35-55 each depending on size (you can also find LeLuv at the link at the bottom of the post as well as on eBay):
https://www.amazon.com/LeLuv-Enhancemen ... r=8-3&th=1As for the pump itself, IMO...your best bet is a high quality, metal automotive manual pump with a gauge...they are more expensive but will last a lifetime and can be rebuilt if needed. I use the Mityvac 8510 $72ish:
https://www.amazon.com/Mityvac-MV8510-S ... r=8-1&th=1 You may need quick connect couplers and hose....LAPUMP makes the best quality though you can also get slightly lower quality from LeLuv:
https://lapump.com/product/female-coupler/https://lapump.com/product/male-coupler/https://www.kodidistributing.com/produc ... ded-femaleObviously, you can spend a lot on this stuff....if you want a good water pump....the HydroExtreme series from Bathmate is pretty good...though there's no gauge to check pressure (max pressure with their system is 16.25" of Hg...which is pretty darn high).