Hi! I'm not from Malaysia but I am a Korean National living in the States thinking about going to UAL. I may not be much of help, but hopefully I can give you some ideas?
First, are you applying to a pre-degree program or directly into their undergrad program- Or maybe you already got your acceptance to LCF?
Depending on which, you can stay for longer than your program. I think... 5 years? and your course is probably only 3 years so you can stay and work a little bit more to help cover the tuition.
Also, I hate to be pessimistic, but I feel like especially for the fashion industry it's good to get out on the market where there's more of sellers, buyers, and big corporations that are heavily ingrained in the industry. LCF is definitely one of the best fashion schools there is in the entire world, and the quality of education and prep in to the fashion industry would be worth it.
Just like any other fashion or art schools, they are VERY expensive just like their location, like Parsons in NYC, and Otis in LA. While the living cost is really high in London, the tuition in comparison isn't as high as other art schools in western countries, so If you are set on pursuing fashion or anything related for a long time, I think it will be a great investment.
For job prospects, I can't really say because I am not commited to UAL either- and haven't been to the UK. But there are many big fashion houses in London, and other business in general- London is a big city and there's got to be a place you can work at. It may not be enough to pay the bills at first, but I think continuously balancing work with your studies can help you a lot especially through like 5 years. After your course ends, you can get like an internship at a company that you really like and that will both support you monetarily and get you in the industry.
Hope this helps!