60′ with i2c or spi or any 3.3V logic signals is a horrible idea IMHO and not likely to work at all at least not reliably. From my quick checking “long” for i2c is something like 10′ and that is with buffering. Some sort of differential scheme would be a big improvement and probably possible. Something like RS485 for example. The other issue is electrical storm transients – again something like RS485 is much better.