Then don't be afraid of the Mercury engines at all...
The model year 2000+ SportJets are based on the 2.5L and 3.0L V6 powerplants that have been the basis for Mercury's outboard lineup for years and years. Literally ANY Mercury certified shop will be able to work on a SportJet even if they've never seen one before. Everything above the jetdrive is a virtual carbon copy of what's inside the outboard cowlings. All of the tools will work... the Mercury digital diagnostic meter plugs right into the same connectors... it's all the same.
As for the jetdrive itself, it's a VERY simple assembly. The service manuals (available online) detail everything. There's really only one special tool that is unique to it, and that's the impeller nut socket - no standard socket is deep enough. The tool is ~$75 from Mercury, or you can weld up one yourself. No shop of any repute is going to be intimidated by the M2 jetdrive.
If you're familiar with the Rotax setup, imagine standing the engine on its back end and putting a set of bevel gears to transition from the vertical crankshaft to the horizontal impeller shaft. That's exactly how the SportJets are laid out. Everything is just bigger because the engine and jetdrive are more powerful (7.25 inch impeller diameter, for example).
Given your situation, I'd be looking for a good SportJet powered Seadoo. You'll be absolutely delighted. We have been, still are, and expect to be for years to come.
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