I think no one has replied as no one can give you an answer. I think you have to research through all the aspects of your career, and your wannabe career like costs etc
If it works out in the favour of doing an integrated course, then go for it. You know what they say, you only live once!
ps, for whats its worth, on my integrated course at the mo there are about 3 or 4 people in a similar situation to you, career switching in their late 20's early 30's.
Best of luck with whatever you choose.
Dozza2k