Any ideas about challenges and issues of helping high functioning autistic person to transition into adulthood?

Does anyone have issues helping their HFA child transition into adulthood?

Is it usual for HFA young adults to have no interest in becoming independent?

Does anyone else have a child who is bright academically but seems to be trapped with the emotional age of a young child?

Is it usual for HFA young adults to get up in the afternoon and stay up half the night?

We have issues with life being one big dream - plans but no action. 

Aspirations far higher than what is possible.

Thinking his parents should always do everything for him. 

Thinking he should be able to live in nice accommodation even if he doesn’t have a job.

I would be very interested to know what solutions they have come up with. Any ideas?