Buy wides and normals, rent telephotos. Not sure how many places where you are rent Fuji telephotos though.
You could also go Sony A7II. That gets you a full frame and access to Canon lenses with the Metabones EF adapter. It supposedly works very well with Sony/Canon combos, even in the telephotos. Canon lenses are far more frequently available as rentals than any other brand. The Canon EF 200mm f2.8 L lens gets good marks and with the full frame, you have plenty of space to crop.
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