My gut reaction is that you should just spend some time writing down your goals and then investing in a small library of books that you can use to accomplish the tasks you are talking about. You are off to a great start just by asking for help. I am betting that the vast majority of questions you may have are already answered on various threads on this forum if you start searching.
Are you physically capable of pruning and spraying and training your trees yourself? If so you will do yourself a favor by learning these skills and building on them each year.
It sounds like funding is not a particular challenge for you, which is great. Do you have space indoors to store a small amount of tools, fertilizer and spray equipment? It would be a reasonable up front investment to get the “good stuff”.
Here are a few threads I have bookmarked to get you started, feel free to reach out with any questions.
Side note - I highly recommend putting together a list of what you already have growing, as well as a wants list to help us help you. Someone trying to grow sweet cherry trees is going to have a vastly different recommendation than persimmon trees, for example. Maybe add that information to your profile or create a spreadsheet? I just added my own take on a list to my profile, check it out.