A: There may be.
A lot will depend on what your lease actually says and what you have in writing from the owner about the 30-day “easy out.”
If the owner clearly agreed that you could terminate with 30 days’ notice, your 45-day notice and the communications surrounding it could be important. That said, an oral agreement may not be enforceable if it conflicts with the written lease, particularly if the lease requires changes, notice, or waivers to be in writing.
You should have a Tennessee attorney review the lease, your termination notice, and all communications with the owner to determine if the alleged damages are correct and legitimate. There may be defenses available depending on the lease language.