While $25k is not enough, if risk is managed wisely, you can trade with $25,500. This is what I started with in my IBKR account. I'm risking about $30 - $60 a trade with no issues. When I'm trading, I pretend the $25k is not even there. I do not risk that money. The purpose of the $25k is to keep me above PDT. As my account grows, I'm able to risk more provided I'm ready to accept more risk. I'm not an intermediate or advanced trader either. I'm actually a novice trader and I have no issues with a $25,500 account using IBKR and DAS.
Respectfully,
PJ Garcia