I agree, sometimes its "better the devil you know", as you know the v70's history, ok so it needs some love and attention, so id get the stuff done that's gonna keep it mobile first....then as you're still able to drive it around, then prioritise the other items in a scale of worst to "niggly" then lower list of "new toys" for last. I would not replace whats still working [toys] till they too fail. Just so it keeps the costs inline with pocket.
TBH ive just bought a V70 recently, 2002 plate awd with touring pack, auto,factory phone factory sat nav and full leather with 2 elec seats for just £800 with 165k on the clock......but the colour sold me....pearl red.
only thing I do loath are the 17in alloys, talk about harsh ride !! oh and no turning circle either. ha ha