Skirting really needs a decent quality slider, since you will be needing
a decent quality bevel cut capability - something the poorer saws are
not so good at.


I did some 12" skirting recently with a £30 circular saw set at 45 degs.
You need some kind of jig/sawboard arrangement for the baseplate to
follow, and two hands to operate the saw, but something clamped on to a
workmate works well enough.