well it wouldn’t be THAT much more, as the LT would be a small fraction of the 4k ProRes,
BUT you are right, there could be a better way, it depends on your original h264 footage,
and whether it has accessible TC.
in that case the H264 remains the master
then you could just create offline edit media,
do your cut, and then conform your hi-res version from the h264
what’s the source of the H264?
have you maintained the original card structure? that would be important for conforming the shots
are you working with a post house on this?
nick