Ford F-150 4WD XLT 8 cylinder 5.4 engine mileage 194k

I've had this vehicle for over 3 years without any hiccups until lately
power steering malfunction; needs complete replacement
open bed-liner knocking sound; rear leaf spring broken
front shock and/or strut assembly

new parts are expensive;
my option, replace them with good used parts from reliable sources

Welcome any recommendations; on repairs estimate cost involved?
Really appreciate, if someone encountered similar power steering replacement done ; share cost for the replacement.
Thx