Dylan is 16 now and needs a new bigger tough bed.

Hello my name is Rachel I am Dylan's mum. Dylan has autism and lots of behavioral issues associated with his condition. Dylan is now 16. He is a very big boy over 6 feet tall. He has grown out of his specialist tough bed. Dylan can't have a normal bed due to his behaviour. He flaps and jumps alot to meet his sensory overload. Dylan is none verbal with significant learning difficulties. He doesn't understand not to jump on his bed. You can get special furniture for children like Dylan, but it is very expensive see the photo below. The company that sells these beds are call tough furniture. I can't afford to buy a new bed. I just don't have that kind of money. I work as a teaching assistant and Dylan's daddy works part time to help with care. Because we work we can't get any help to pay for the bed. 
Dylan will also need a waterproof mattress as he is also not toilet trained so wets the bed often.
Can you help us help Dylan be more comfortable when he goes to bed. You never know we might get a full nights sleep.
We are looking for £1800 for the bed, mattress and new double sized toy story bedding. Dylan loves toy story. 
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Thank you for reading