update as of 5/26/2021:
bus has been gutted. put the sound deadening on ceiling and walls. Unused wires have been removed. Rust has been treated in back by the rear lights. Rear lights are replaced with all LEDs. Took care of couple water leaks. I am still moving forward with the build until someone is ready to buy.
I just bought this and had it inspected. All ok with bus. Just spent $1089 on calipers and brakes. This was preschooler transporter bus so they maintained every 5000 miles. Wife wants van rather than bus.