I agree, BookABoo.
He's been vulnerable in the long term, and he's concerned about break-ins and so forth.
His decision seems to have been to buy a gun to resolve this. Now I can recognise that this is fairly commonplace in areas where there's high gun-crime - lots of people in South Africa own a gun for their own protection.
However, they are generally able bodied people. OP is not. So you'd figure that he'd put in place other things to ensure his own safety - not least because, according to this doctor, he may not be able to walk towards an intruder and shoot while carrying a gun in the dark. That's a disability he's always had; even with a gun, he might not be able to protect himself.
So he might, for example, have a panic button, have a sensible escape route planned and so forth.
I simply can't compute being in that position and thinking 'I will move, in a precarious fashion, knowing that I cannot protect myself, knowing that I can't outrun anyone, towards the danger.
Especially not when the bedroom door is lockable, and an equal distance away.