Batteries won't hold charge - need help

If you need a quick solution (which your post states), you can consider adding one of these to each battery and disconnecting them each time when you leave them. Simple to install. That will guarantee nothing is being drawn from the batteries while you are away. That will give you time to fix the problem later once you get settled in.

https://www.amazon.com/gp/product/B07SBFKM5Y/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Good luck!
Chris