Condo in ulu places are cheaper but have less value so if you are thinking of renting, you may have trouble renting it out. A one bedroom condo already costs the earth (even in ulu areas). If you are living in with your mum, minimum you need is a 2 bedder. Which costs even more obviously.
Banks will only loan you a certain amount. Firstly MAS has rules as to how much they can lend. Secondly, even if MAS has no rules, the banks are obviously worried about lending copious amounts of money to someone earning just $3,000.
What the bank is willing to lend is definitely NOT going to be enough for you to finance half a condo let alone the entire thing. How are you going to get the balance?
Even if say your mum sells her flat and by some miracle you manage to get enough money to pay the balance while the bank loans you the rest. Are you able to maintain the condo?
$3,000 salary is not much. I don't know what you spend on but $2,000 a month sounds quite a lot for someone who has no housing commitments. If your savings are only $1,000 per month now, what happens when you do get a house?
You have water & electricity bills and monthly loan repayment. Condo conservancy charges aren't cheap. And if the residents vote to upgrade something or add something, even if you voted against it, you still have to pay if majority vote for it. Big repair jobs like elevator replacements, replacement of swimming pool filters, etc are going to cost a lot too.
I don't know if you have any insurance policies, if you do you need to set aside money for the annual premiums. In short, based on your salary and how much you save currently, its going to be hard surviving each month if you do get a condo.
If you are really keen to move out and have your own pad, no choice, at this stage you have to just make do with renting a HDB flat. Then wait till you are 35 and you get apply for BTO 2 roomer or buy resale flat. Or if you get hitched then you can go for either BTO or resale.