The "crimpers" have gotten cheaper.
the cinch style about 20$
Here is a decent crimp style for under $50
Multi-Head PEX Crimper: IWS-FAS copper ring crimp tool kit includes 3 exchangeable die sets(1/2'', 3/8'', 3/4'') and built-in 1'' jaw, Go/No-Go gauge, PEX cutter. All components fit in a customized carrying case. Purpose: IWS-FAS F1807 PEX crimp tool kit is designed to compress copper crimp...
www.iwiss.com
You might need a pocket crimper for up in tight places. (kind you actuate with vice grips/plyers)
There is also a sharkbite flex line set that works acceptably.