I don't count string costs, but it would probably wash anyway because I'm sure the MIMs are shipped with rounds.
Actually no, fretless Jazz MIM ship with Fender flatwound and they are very nice strings. And at 50 bucks a pop I do count them, but I also understand not everybody has the same tolerance level for spending money.
It seems to me MIMs would have the same problems (cheap bridge and tuners) as the Squier, but be $170 more expensive. I don't worry too much about the different woods used at this price level. One of the guitarists I play with has an agathis Ibanez, and it sounds fine.
The first MIM fretless I bought and returned was actually alright, I returned it because the high D was completely dead but the rest of the bass was actually quite nice. The second MIM I got in exchange was horrible, totally unplayable and it looked like it was put together by 5 years old kids, I wouldn't have paid 10 buck for it.
The store I go to is getting one in for me to try, here's me hoping that Squier turns out to be a nice bass after all.