Having lessons from a good teacher is an investment. You may not realise it at the time, but as you progress you will.
I've been fortunate to study with some amazing musicians, who have been truly inspiring. Not just bass tutors but others who have taught me so much about composition and arranging, and put me on course for where I am now.
Bass wise, the best tutor I've had was Steve Lawson who I studied with for a couple of years or so.
There were some amazing bassists at uni who I studied with too, but for various reasons didn't get much from, mainly because I wasn't interested in developing my traditional bass playing skills, it wasn't stimulating creatively for me.