I’ll be in the middle of my career at 28. Depending, of course, on whether the approved retirement is still 20 years by then.
Like your uncle Russ, you could be in the middle of your military career quite early in life, but when you retire at 38 (O ne Zot ;-), you’ll start something new. You probably won’t find your CG retirement pay is all the income you need, unless you go for “beach bum in the Philippines” or something else in the “no electricity or running water” genre.
Singapore is very expensive.