@Moonshed whilst I agree with the first 2, I can't comment on 3 as I use Sharpcap for my polar alignment, it's a lot cheaper as it uses the guidescope/camera, and works very well, I also use it for planetary imaging (not very successfully). I also use APT for my DSO imaging, I just love the way it works and controls all my equipment via Ascom. The Goto++ application works perfectly once you have all the correct settings and platesolving software configured. I did struggle with autofocussing to start with but after a few pointers on it's forum I soon had it working.
I would also like to add to number 1 if I may, an additional laptop/PC with RDC/Teamviewer, so once all setup I can sit inside in the warm and keep an eye on it remotely 😀