WIFI antenna / metal roof puzzle

Greetings,
Been struggling with this for over a year, with different antennas/adapters. Need to pick up neighbor's wifi (2.4) directly across street, close range (400 to 500 ft) for my laptop, but suspect major interference from my metal roof. Also suspect her signal is weak or partially blocked.
Signal is in & out constantly, out for long periods, weak when it's in, and worse when rainy or foggy (I can usually pick her up better with my cell, but can only use it outside due to metal roof). Currently have 25 dbi yagi antenna with low loss cable hooked into brand new highly rated USB adapter. On rare occasions I have lightning fast connection. Have tried moving antenna around, & the further from roof I get the better it is. But cable doesn't allow the distance I need, and cable can't be longer or signal will degrade. Plus I don't want this heavy cable/antenna in the middle of my yard. How can I work around this? Does antenna need to be close to neighbor's house, with repeater or booster between her and me? How best to configure this?
Btw, I want to keep a wired-only setup between antenna and laptop if at all possible.
Huge thx for any tips!