I like the idea of the potted plant with removal each winter.
Frank, earlier this year, due to a death, we remodeled and updated a house to be sold, belonging to my husband that his mom lived in for over 40 years. There was carpet on the floors, and the tile in the entry was lifting. Then came the leak. Then came the structural engineer. Then came the bad news! Roots had invaded the slab, and they made us rip out and replace the entire slab in two large rooms. Several thousand dollars later, everything was fixed, and the house sold for more than we asked.
We are searching for property now, and one of my priorities is to check how close the roots are to the house, and I walk around the entire foundation looking for cracks.
Good luck to you!
Suzi