Here is US CBP response to my leaving Canadian RV trailer in Florida. One year limit, then import or remove. In my case, there's no point in spending 5 months in Florida then 7 months storage down there with a mandatory removal. This is further complicated with the insurance issue in my case.
US CBP RESPONSE
Thank you for contacting the U.S. Customs and Border Protection (CBP) INFO Center.
The trailer is only allowed to be in the USA for up to a year. If the trailer will stay over a year, you will need to import the trailer into the USA.
For additional information regarding importing a trailer into the USA, please visit: https://help.cbp.gov/app/answers/detail/a_id/415/kw/trailer
If you have any other questions or concerns, please feel free to call our toll-free number 877-CBP-5511 (877-227-5511). From outside the United States, please call 202-325-8000 – you may incur charges from your telephone service provider for this call. Our service hours are Monday through Friday from 9 a.m.-4 p.m. Eastern Time. We are closed on all U.S. federal holidays.
We hope our answers ease your entry into the United States. Please understand these answers are informational only, The CBP officer who speaks with you upon arrival determines the admissibility of goods and visitors.
Thank you again for contacting the CBP INFO Center.
Sincerely,
CBP INFO Center