I actually find it pretty satisfying to bend and flare my own lines. The nickel-copper stuff is super easy to work by hand. But even the plain old zinc coated steel in 3/16 isn’t bad.
I prefer to buy the straight sections with the tube nuts already on them. Even if you need to cut down and re-flare one end….its half the flaring. And buying the tube nuts separately gets spendy. The straight sections also look better, IMO.
