I bought my home in 2006 and the plumbing was shot. I bought a 1/2 inch crimp tool and a 3/4 inch tool for about $100 each. Pex was cheap but fittings were not as cheap. Lowes had a selection, Home Depot had a selection, Ace hardware too, but none had everything I needed. I had to buy water valves in different stores depending on what I needed. Under the sink shut-offs, toilet shut-offs, etc. I was worried about freezing in the crawl space under the bathroom but my understanding is that the pex can ha=ndle freezing bettter than copper or CPVC. I have had no problems,
They do make cheaper crimp tools now but the crimp rings are different for the new inexpensive tools.I would like one for hard to reach areas. The bigger crimpers, like I bought, need lots of space to open the handles. They look similar to bolt cutters and the handles have to open wide to start.