How long should completely renovating a 6x12 bathroom by yourself take?
I don't think we can judge your estimates via the internet. Some info we don't have.


your skill level. The time it takes to do a job seems to vary about 8x from novice to expert. Since you're asking this question, you're probably on the slow end of the scale.
tools. Having the right tools makes the job go faster and produces better results, but buying a full complement of tools may not be a good idea. Stopping the work for a tool shopping trip is a big delay (or the best part!)
your time and energy. If a pro works 8hrs/day but you only work a couple hours in the evening, it will take you way longer. If you decide to work 12hrs/day but get tired, then you'll need to factor in rest time. If something else in. Your life comes up, your project may sit idle for a while.


I've found that diy projects don't save me money or time, unless they are very small. I do them because I enjoy it, and like knowing I shaped my home.