A recurring topic is "what to look for" when purchasing a Toyota MH.
Here's something I found on mine, that I could easily have seen, but didn't inspect before the purchase.
In my rig, both the engine and the coach battery are located under the hood.
The coach battery was installed on the driver side behind the headlight. I sat directly onto the fender well structure - not having a "rack" for support like the other battery.
I finally got around to removing the battery for replacement. The metal under the battery is corroded/rusted. It requires some repair work. It equates to body cancer. Now I get to learn how to repair this... welding I suppose... this is a common repair for vintage vehicles.
When I buy another, this will be on my checklist.
Later...