Looking at your net worth and condo info, we can deduce that your assets less condo is now worth $600k ($700+650-750). This would include your CPF savings. If you both work for the next 20 years, your additional savings will be $1.8m ($90 x 20). So your investable assets will be $2.4m. Part of this will be your CPF SA and MA savings. Let's say the min sum for you when you reach 55 are $200k and $50k respectively, so the total CPF that need to be set aside for you as a couple is $500k.

When you reach 65, your CPF Life payout will be about $1500 for each person per month. So you get $3k pm in total.

You will also have cash of around $1.9m ($2.4m - 0.5m). You can invest in 5% dividend yield stocks giving you $95k pa or $7.9k pm.

In total you will have passive income of $10.9k pm ($3k + $7.9k) or $131k pa.

If you are lucky, your children will also give you a monthly allowance and this is a bonus for you.

So, you should have no problem retiring in your condo. If you want to get more cash, you can sell your condo and buy a smaller condo.