I read a thread not too long ago, where a guy with the same motorhome as mine had the water supply line to his water heater burst while he was out for the day. Like me, his water heater is behind the drawers of his bedroom wardrobe. The result was extensive water damage in the bedroom of his coach.
On the advice of the OP, I replaced the inlet and outlet hoses of my water heater with steel braided hoses, in hopes that they might be less susceptible to bursting. I left the hoses pressurized for several days before buttoning everything back up, just to make sure there were no leaks at the connections. Iím glad I did, as one of the connections started leaking slightly two days after the install.
That same night I laid in bed thinking...what if it started leaking again months from now? The connections are not readily accessible - I would never know until I saw water damage. I had seen water leak alarms at Home Depot, so I started looking for something that would work well for my application. I ended up buying the WatchDog alarm on Amazon. It has a detachable sensor with about 4' of wire, so that the alarm base can be mounted well up out of the way of any potential leaks.
I placed the sensor on the floor near the water heater and attached the alarm base to the face of the water heater inspection plate, inside the closet. The alarm is now out of sight, yet it is loud enough to alert me of any potential leaks.
I realize itís not 100% foolproof, but for $16, I think itís better than nothing.