Wonder if I can help here.
I am located in a neighbouring suburb to Rouse Hill!
I need to take caravan out over the next 1-3 week to get rego check. Perhaps I can swing past your place, with my van, to see if my aerial and TV works at your location?
Can then try your TV on my aerial and perhaps my TV on your aerial (but I don't want to bust my TV though

)
My aerial and TV are good.
Not too good with wiring and the coax side of things but this may be of some assistance? At the same time, not sure what it is going to prove.
Did read through your 2 threads and seems like you confirmed your TV is good (works inside), and you bought a new aerial, so might be wiring or booster.
My booster needs it's push button pushed in and then green light comes on etc.
Offer is there. If all else fails, I get my caravan service at
https://www.paultall.com.au/ (Londonderry NSW) and highly rate them. My caravan has never seen Jayco ever since it was bought