Thanks to everyone for the replies.
My goal is to learn as much as possible so I can maintain as much as I can on my own.
But there will be some months where I will have to pay someone because I will not have the time.
It will be used 12 months out of the year.
I will have to pay someone to maintain it as I travel for work and am out of town for several days at a time.
I understand several factors come into play here but a conservative estimate would be greatly appreciated.
Thanks.