well, if you always have electric hookups, there's no reason to get a 12v tv.
even with a 110vAC tv, you can use an inverter if you have no hookups.
you mention "antenna". does the trailer not have a crankup tv antenna?
if not, then you've got a lot of work to do.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC