There's no reason to have 12 terminations. In fact, he could simply run a single CAT5e with PoE power to the edge of the building to a PD powered media converter, aerial fiber to second building, PD powered media converter, back to copper, to another PoE switch.
This scenario would alleviate the need for surge / ground protections, due to the use of fiber for the aerial. Using copper over the aerial, you need surge for each link anyways, so your terminations (12 is it?) and surge protectors will likely eat up more budget than the fiber and media converters.
Also, it is just the right way to do this.
EDIT: This is assuming that two UBNT NS Loco's wouldn't do the same job for you.