Welcome to our little world. It all depends on whether you are a tinkerer with some mechanical aptitude, and of course money vs. time. It's very convenient to have the first setup done by a pro, but not as instructive. The setup controls what we call "the action", or string height, as well as intonation.
There is nothing difficult about doing your own setup, look in the sticky post at the top of this forum for links. Basically the parameters are neck straightness, string height at the nut, string height at the bridge, tuning and intonation.
Neck straightness is controlled by the tension on the strings vs. the adjustment of the truss rod in the neck that imparts a concave bow as it is gently tightened with the strings loosened or while applying a little back bow with the knee (to prevent stripping the threading on cheap steel). An infinitesimal concavity is what is desired. Using lighter strings generally requires slightly loosening the truss rod screw/nut.
The nut is filed to snugly fit the strings and to lower string height at the nut, or a new nut is cut if you need to start over.
The bridge has adjustment screws to raise and lower each string's saddle. With the instrument set up as you like, horizontal adjustment screws at the bridge are optimized for each string to give you a perfect octave at the octave point on the neck.
Very simple, the only unknown as mentioned is whether the neck is well made enough to allow it to be perfectly flat under different string tensions.
An electric bass has a lot of flexibility compared to an acoustic instrument. Most fretless players like a very low action to where the strings buzz a little, making that specific fretless bass "muaa" sound. No neck is 100% perfect, but a bad neck will go significantly s-shaped as you adjust the truss rod. If you run into that, it needs to be replaced under warranty rather than sanding ("dressing") it. Everything else is doable as a matter of course in a couple of hours of trial and error. Lovingly setting it up is a nice way to get to know it over an evening with a glass of wine

. Have fun.