I think you are under estimating the time commitment and the cost of starting/maintaining an orchard. At the size you are looking to put in I don’t know if it would be profitable. You don’t have any economies of scale at that size. If your main interest is increasing your income I don’t think starting an orchard is a good way to do it. Getting a second job would be a better choice. You get an hourly wage immediately and don’t have to invent any money.
I don’t think you have a good feel for how spraying is going to work either with an organic or synthetic spray program. I would take a look at this post and the rest of the thread as well.
Also look at this thread which deals with starting an orchard on a low budget.