I want to make a random-length inverted-V for general listening and
perhaps, maybe, occasional HF work, no pretense to have perfect match
or minimum losses. I see much discussion about feeding a random dipole
with 450 or 600 ohm ladder line.

I can lay a low loss 75 ohm line but absolutely not a ladder line, so
I'd have to put a balun at the apex

I'd cut a dipole of about 15 + 15 m (50+50 ft), 120 deg. inverted V,
apex at 15 m.

I could do 1:4 - 300 ohm or 1:9 - 625 ohm.

What would be the least-bad?

Thanks in advance!