As the OP I can now say for me the answer is YES I should have one / need one.
My new Yamaha TRBX174 arrived today with gig bag for £250
It was nicely setup out of the box, maybe a little high. Truss Rod tweeked and action lowered to the same as my Fender PBass and put new strings on it ( stock are not great )
Ready and set now and for approx a 1/3 of the cost of my PBass I have a very usable second bass / backup
Sorted 👍