I'm in the process of looking further into this product for my trailer. With it's size, capability for extended periods and fast location speed (every three seconds) versus 30-60 seconds and the price is reasonable.
https://landairsea.com/?gclid=EAIaIQobChMIs4CQraz19gIVcxh9Ch0D5A9BEAAYASAAEgJpIvD_BwE