We are much further down the line as our DD - only child - is now 32.
(Apologies for the very long post in advance.)
She was born with an extremely rare gene mutation which causes horrendous cluster seizures, severe autism and very challenging behaviour along with severe learning disabilities.
Our DD looks perfectly normal until you try to speak to her as she only has the speech of a toddler - odd words - and overall is like a 2-3 year old.
We managed to get our DD into a special needs nursery at 3 years old followed by 3 years as a day pupil at an excellent school for medium - severe autistic spectrum disorders - all transport was covered to both which were around 30 miles from home - but once she was almost 8 years old the school admitted they could no longer cope with her and she really needed 52 week residential school. ( At this time she was very destructive and quite violent with super human strength although she was only a tiny tot plus she suffered horrendous seizures for days every few weeks.)
Again we were successful in obtaining an excellent residential school placement for her which was 2 hours from home and we used to drive over to visit every weekend. (This placement was a blessing in disguise although didn't initially feel like it of course.). She stayed here until she was 16 and then transferred to another, much smaller residential school for 16 plus which was slightly closer to home and she was here until 19 years old.
Over the years, I'll be honest, we had made some very good contacts who were very senior in Social Services locally, one who tipped us off about a brand new centre which was opening, 20 minutes from us, for supported living. We were so, so fortunate that DD was accepted and transferred over a few weeks after her 19th birthday and has lived very happily there ever since. She has a beautiful, one bedroomed apartment with it's own large courtyard with fantastic 24 hour care. The management and staff are some of our best friends now and DD has a great life. We see her 4/5 times per week and she comes home for a short visit with 2 care staff every few weeks but always wants to return after a couple of hours.
However, I won't lie, it is still very hard and there is very little reward. Her seizures have - touch wood - been totally controlled for almost 3 years now but she still is very challenging and often slaps people for no obvious reason. She is very, very obsessive and extremely demanding of us.
Nevertheless, we wouldn't be without her for the world.
Whilst she was still living with us my husband gave up his full time post to care for her as I was the main earner at that time and he was still able to teach one day per week. Then it became too much for him alone so I took had to give up my career and started a small business from home which eventually became very successful. DH was then able to return to work full time so we were very fortunate work wise that we were able to keep our heads above water. It certainly hasn't been plain sailing. You also find that you gradually lose friends but that didn't bother us as we've always preferred to be by ourselves.
This has been our life for 32 years. I know things have changed a great deal over the years and there seems to be even more jumping through hoops these days to obtain the help your child needs. My advice would certainly be to do all you can to obtain a special needs school placement., either as a day pupil or residential, and definitely plan for your ds to enter supported living as an adult. You do need to do all the investigations yourself and be very aware that social services will always want to place him where it is cheapest so you do need to fight which is exhausting but so worth it.
Wishing you the very best of luck! 💐💐💐