I began studying Chartered Public Accountancy this year - i am in my early 30s. Agewise, students at lectures i attended ranged from 28-55. I have a demanding full-time job and spend 2.5 hours a day commuting.
In CPA, you MUST pass all four subjects at ONE sitting. There is very high failure rate. The level of dedication is required is very high, and balancing study,lectures, job, commuting and the very occasional social night out is very tough. I attended lectures last year, and am attempting exams this coming April (2008). I was in no way prepared for the instensity!
In contrast, with ACCA, you can study and sit ONE exam at a time. Which is much easier to manage.
You will get exemptions for your third level qualifications.
In both CPA and ACCA, you must also complete a training record - if you only do the exams, you will only be part-qualified. However, from reading your initial entry, you actually do have quite a lot of experience in, for example, Management - so you might be pleasantly suprised at how much credit you will be allowed for your current experience.
Def go for it if you want to! On an aside, what about becoming an IT auditor? IT auditors are in very high demand, can command high salaries. Most auditors have accountancy qualifications - cos auditing is fairly new - but look at the Institute of Internal Auditors (uk & Irl) and check out jobs & salaries..
good luck!