Having 60 rows in a repeater will likely be an issue unless you increase php max_input_vars.
Using a CPT will allow for and unknown future enhancement. If you use a repeater it will be more difficult to make changes.
Repeaters are difficult to search/filter and they are difficult to put in some order other than the order they are entered. Repeaters have their place, I just don’t feel that it for large data sets.
