Pat,
If I were you, I think I'd forget about a log-P antenna.
Personally, I'd forget about the locally made one too. If
the 'TH3JR' is still in the unopened box, it sounds like you
don't really care much about having a beam up in the air and
in use. And to be painfully honest, it also sounds like you
just don't have the room for one. Keep shopping for that
gravity defying, invisible, super-duper special only 3 feet
wide with the built in de-icer...
'Doc