I have a brother who was diagnosed with it about three years ago. They have just now found the correct balance of meds for him and although there's no pretending the disease is anything other than grim, he's now on an even keel, so to speak, and has a decent life at the moment. He is able to look after himself enough that he preserves his dignity in terms of personal care and hygeine but often needs help with cooking and suchlike.
He found it very difficult to stay with the program for the time it took to stabilise his drug regime but is now comfortable with his meds.
He says that the one thing that has been really helpful to him, head and shoulders above all else, is a regime of twice-weekly Yoga sessions and twice weekly Pilates; those two changed his whole outlook on it all and continue to provide him with both peace and a good level of fitness and suppleness, both very important with Parkinsons as the usual physical habits change drastically and fitness tends to take a back seat.
The one thing that he needs help with on a regular basis is remembering to take the correct meds at the right time (crucial) both because of forgetfullness and lack of motivation.
I really hope that your wife comes along with it as well as possible, It really is a classic case of catch it as early as possible and it can be held at bay and a decent level of comfort provided.
Good luck to you both....................