TS, it is possible!

Plan your journey and stick to it.
1st year - read,read,read, understand, read, read, write.
1 1/2 ready your journey for data collection.
2nd year - Do data collection within 5 months!
2 1/2 year - analyse your data within 2 or 3 months.
3rd year - add up, minus, check plagiarism.
3 1/2 year - ready for viva.

BTW, where are you studying? Local? Oversea? Commitment is the key in TS's concern. My aunt completed her PhD in Aussie within 3 years.

You can do it!