We recently installed a fully DDA safari tent on the Sandringham estate which will provide holidays for the disabled community (for give me if that's not the correct term)
Its worth taking a look at as this is a much under addressed part of the glamping market place. There is a 3d walk through link below. We had to pass some quite stringent rules and regs, the kitchen and bathroom are compliant. The tent includes two adjustable beds as well as standard beds for family, carers etc