Have your installer remove the antenna for you. Just make sure he ties off with a fall harness. He should have the safety gear.
What was your SWR for the temp install in the attic? Try putting your base antenna in the attic and do range tests. Do not cut the coax until confirming coverage.
Putting the radio in the spare bedroom with the antenna in the attic is probably the most cost effective solution.
Consider your wife though. You call her from the truck and she has to run up stairs to answer...every time!
IF the coverage is good from the attic, Putting a radio with the antenna and using a remote head might be ideal.
My thoughts are worth what you paid for them. Best wishes.
Here's a thought! Put a repeater on the silo. If the repeater is up near the antenna, you could give your wife a handheld and reach ALL your property, into town, and further. LOL