A directional am is cost prohibitive to rebuild for smaller owners......they could go on an STA for non d operation but they wouldve had to rebuild WKIZ's directional array.. not worth it today
I had some limited contact with WKIZ, though being based near Seattle, I was too far away to be of any practical help.
If you'd had an opportunity to look at the station's applications file, you'd see a long, long, LONG list of STAs. I don't know if it ever got 5 years of stable operation at a shot. For about the last 10+ years of the station's life, it operated at reduced power, due to failures of one tower or another.
2 of WKIZ's towers were built on piers in the water, secured by heavy chains and screw-in stainless-steel anchors. The 3rd was attached to a dock and was, at least when I visited the site, converted to a unipole.
In one case, a motorboat went through a guy wire, dropping the tower. The owner eventually got that put back up, only to have a hurricane take out another one. That ended his interest in the station and he bled a reduced-power STA for years before donating it to a religious broadcaster out of Miami.
The religious broadcaster got new towers up, tuned and licensed, only to have them taken back down within a few short months by another hurricane. By that time, the relationship with the landlord had soured and the company was not able to resolve all of the issues and make the station's recovery "make sense". In addition to the landlord issues, getting permits to repair & install in the water was no small accomplishment.
Besides the dubious reliability of the tower piers and anchoring, corrosion was a major problem that no recent owner seemed interested in keeping up with. If a boat or a hurricane didn't take out a tower, corrosion eventually would have.
In the end, about the only redeeming quality of the installation was that it got out farther than you could possibly imagine 62.5 watts providing... possibly due to it having a really good ground system!