I found myself in a similar situation just over a year ago. Age 49. Wife and 15 year old son, just started renovating a bungalow then BOOM Parky dx.
I did have and still do get the odd meltdown as I expect most sufferers do. It is a life changing situation. You have to think how you are going to deal with the future. notice I said deal with the future not cope with it,I believe if you think positively it can be managed especially as we are younger.
I have a very physical and stressful outdoor job but have managed to keep going. I am only planning one year ahead at a time.
Things do change, I started my medication immediately on advice from my neurologist to be honest I didn't know whether I was Arthur or bloody Martha for several weeks. I didn't get to see my Parkinson's nurse until February when she told me I should have had 6/8 weeks off work when I started the medication, like that was going to happen in my line of work, livestock needs feeding.
Things have improved now I have a great team in my local area. (Kings Lynn, Norfolk)Occupational therapy workers. Physios. Parkinsons nurse and even my neurologist, when I get to see her. My advice is take all the help you can get.
Think things through, enjoy your family, mine are a great support to me as are my friends. My wife has joined a group on Facebook for carers of people with Parkinson's she finds it very useful.
The one one thing I find is there doesn't seem to be a local group for younger people with Parkinson's the group sessions I have attended have had a few younger people there but mostly MS sufferers.
I wish you all the best with the future it can be tough but not impossible