A 15k budget is nice, and being able to fly on weekdays makes for good access to any shared aircraft.
I'd define the mission first.
If you want to bimble, the choice is wide. If you want to move forward in mission capability i.e. get the IMC Rating, fly further out (into Europe), maybe do an IR one day, that's very different and you need to choose the plane and (more importantly) the existing shareholders more carefully.
Shares can be hard to sell; often they take years to shift especially if, as is common, the group is falling apart over a disagreement over which bits of "unnecessary" avionics etc should be fixed.