I have around 25 recently qualified ACAs in my team - all Big 4 trained, nearly all fluent in English and Cantonese and those who do not speak good Cantonese generally speak either Mandarin or another relevant language such as Bahasa. Salaries are between HKD 400-750k for recently qualifieds, plus benefits and bonus.
Having worked in London for many years, I was shocked at the hours worked in the Big 4 during peak season - 2 to 3 am finishes seem to be the norm, while that would have been quite unusual back in the UK. PwC is the largest firm here by quite a distance and I know of a number of people who have transferred from UK offices, though typically they are senior manager level and above. The other firms are smaller, so while transfers still do happen, there are less opportunities.
Regarding roles in industry, I'm sure you will already know that FP&A roles are much more popular wherever you are in the world than financial reporting roles, so there are likely to be more opportunities in financial reporting, though there is a demand for those with really good FP&A skills.
Finding employment as a non-Cantonese speaking ACA is harder, but not impossible, particularly as you have PR. You say you were raised in the UK - was this as an expat or a local? If as a local, I would suggest brushing your Cantonese up if you can. If you do still have family and friends in HK, then see if there are any openings they know of - networking seems to play a much bigger part here than in the UK. Otherwise, try contacting the finance recruitment specialists - a lot of the ones we used in the UK, like Michael Page, seem to have thriving practices here in HK too and they seem to be always on the lookout for good candidates.
You should be able to initial interviews by Skype, though if the recruitment process got serious and you were down to final interview, you could well be expected to come out here to undertake the final stages in person.
I wish you well in your job search.