Panasonic AG-UX90 and frame rate conversion

I am considering upgrading from an older Sony VG20 to a Panasonic AG-UX90, which has revived great reviews. I have been living in a PAL country, so I have used 50p sequences and then converting it to 25p when exporting the sequences. The AG-UX90 only does NTSC 60p, 30p and 24p. I don’t use the camera for TV, just for weird little “art videos” occasionally used at festivals and art galleries so frame rate is not that important (though one now requires 24 fps). I also use a lot of slow motion. I’m starting to use 4k.

My question is that if I start exporting 60 fps as 24 fps, and occasionally bring in my 50p clips in a sequence with the newer frame rates... all to be exported at 24 fps, will this camera be OK (using time interpolation)? This camera is 2-3 k less (in NZD) than its more advanced sister models (such as the AG-UX180) which does 50 fps in addition to NTSC. Another option is to pay a little bit more for the older 4k Panasonic HC-X1000 which also does 50fps and would be consistent with my older clips. Any suggestions?