are you going to run a random wire/long wire, or dipole configuration?
You'll need a tuner, or at least, something to test SWR if you run a random
wire.  If you use the dipole configuration, you can get close enough to
resonance by careful measurement of the wire halves.
I'm sure you've probably gone over all this since I didn't closely follow
all the threads of late.
On the top of your house, do you have a chimney, or furnace exhaust outlet,
or even a fan vent?  If so, you can use rope  as an insulator and run the
wire from the top of the house down to the furthest point on the fence.
Use some 2 inch PVC if you want to get the fence end of the wire up a little
higher off the ground.
You can use rope, or heavy duty zip ties to secure the PVC to the fence
line.
If you use a random wire, or long wire, make sure you have some sort of
counter poise.....as much wire thrown down on the roof of the house, if that
is where you end up running the wire from, as possible.
I'm not sure if you have a fully fenced front and back yard or not, but
putting a 25 foot chunk of galvanized pipe up at the front corner, and
another pipe of similar length up in the back opposite corner would give you
a nice run and make it easier to run a dipole instead of an end fend long
wire.
And, if you have a long enough fence line, a long wire around the entire
fence line would probably work not to badly on 75/80 either.

73
Colin, V A6BKX