As the other say it is doable if you are motivated and if you like exams so much the better.
What I hadn't quite thought through is what you have to do once you have passed the exams. After the initial huge sigh of relief when you pass you then have limited time before you have to potentially do them all again (...never ... I said). So think through the timing of your plan afterwards. You need to hang a CPL on them within 3 years and an IR in 5 or 7 years...(Someone will correct me) otherwise they are all null and you start again...I've seen lots of people do this...
For me without realising it it forced me down the modular route and I don't regret it. If I hadn't had the ticking clocks I doubt I would have completed the CPL/IR.
Good luck!