TV Tuner - Yes. An ATSC tuner with a COAX antenna input that can auto-scan for receivable channels. If this isn't feasible anymore, then I guess the HDMI input doesn't need ARC.
Connectors - looking at your photos, your input connections are on the side. If you put them on the bottom (down-facing), I think they'd be easier to reach if the TV is wall mounted (maybe not as easy if its on a table-top stand though). As long as they don't stick straight out the back, any orientation would be acceptable.
What's your experience with outdoor displays? 1000+ nits, IP-67 rated?
[1] In my area, that would be someone like https://www.gramophone.com