It's always good to have goals and wishes! Your photography is really great, I don't know how people can do portraits of people haha I'd feel so awkward! As for your future camera, I currently have a Nikon Coolpix L820 which I know is a downgrade from what you currently have but I'd have to say that I've been impressed with the quality of the product and would recommend looking into Nikon as well! A friend of mine has the Sony a7R II mirrorless and plans on upgrading to the a7R III as they love the camrea!
RE: If you write it, it will come