I have pulled over 3000ft. of wire under my layout and would not recommend using solid wire. In 22ga. If you nick the wire when stripping it you have just created a weak point in the wire which after flexing is the break point. Working under the layout you are going to be moving the wires around at some point. I have used very little solid wire and only because it was found at a yard sale for $5 for 500ft.
Whichever wire you decide to use setup a way to have it come straight off the spool it makes pulling wire much easier.
