er.. bro BuBu & partner, i'm no tauke leh (although i like eating tauge ) - just a worker ant like 80% of the world's population

Ok onto the numbers and "opinion-ating":
1. Concept & Approach
Congratulations to your partner & U on having such thinking & approach - a truly "one for all & all for one" + a great savings and wealth generating approach too.
In addition, both of U didn't fall into the "car trap" - a SERIOUS destroyer of wealth in Malaysia, especially when it can cost nearly 1/3 of an apartment.
U sure both of U are 22?
Dagnabit - i wish i had such discipline & thoughts in my younger & dumber days, thus wouldn't have gotten into so much kaka

2. Numbers
er.. what's "BT Income"? My apologies - old uncle here have not heard such terms used with other fellows hehe. I'm not "too in" so to speak.
I'm assuming it's net income here yar.
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A very good savings rate 57%+ of net income! 
er.. i'm assuming PTPTN loan is being repaid as well in your total expenses yar

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Extrapolation of your cash investments/assets, based on average returns pa 7% + average inflation pa 4% and NO INCREASE IN SAVINGS pm!
Realistically, as one's salary & commission grows, savings can grow.

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Extrapolation of your EPF and EPF-related investments

Looking at BOTH the extrapolations of EPF-related & cash investments, both of U will be reaching financial freedom OR at the VERY LEAST, comfortable retirement.
Note that there's an NPV (net present value) calculated to give U an idea what your future value of $ is worth today.

Now all U have to do is:
1. Keep on being mindful of expenses & saving like what U are doing - half for spending & half for saving
2. Learn how to manage $, risks & invest. this er.. summary (though long-winded) may help http://forum.lowyat.net/topic/1577849/+1551
3. Hit your financial freedom level 0 (basics / bare necessities), then go for level 1/2/3 (better retirement lifestyle) if wanted OR just relax 
U may want to learn to "give back" effectively as U travel through (1.) to (3.).

Attached is the ZIP of the Excel files snapshot above - for your easy SIMULATION/WHAT IFs if U are Excel inclined.
Please note that the above are just extrapolations and personal opinions, not gospel truths.
Just a thought 

Hm.. funny, screenshots 2 & 3 black only, even though checked and re-uploaded..