Yep, I say do it. At 30-31 you will NOT be "old" even in UK, and doubly so in SEA, so don't think you are letting your best years slip by or whatnot. But make sure you stack the cash, and work on starting your location independent biz now rather than leaving it until later. Unless your job is extremely demanding and fast-track, I don't like the sound of "thinking of starting a biz in my early 30s". Get excited about it, do it now, you have a great few years ahead with no pressure to make it big immediately. If you are learning to run a biz, going to the gym, and seeing your account get bigger every month you can still have a blast in the next 5 years.
Dr Johnson rumbles with the RawGod. And lives to regret it.