Hi Friz
I agree that the above are very important considerations.
Regarding the topic. Did the Masters go well? If so, are there any academics you worked with/were taught by who you could talk to about potential topics or more general advice? That is what I found most helpful, as once you have someone who is willing to support you, they can give you guidance and help you secure a place or funding, as well as giving feedback on your proposal/development of ideas.
Best
Tudor