This is why I stopped playing HU cash. Last month I sat with $20 against a guy who had $16. Less than 15 min of play we had paid $4 in rake. Luckily he ended up paying it because when I got back to my original $20 I sat out and told him this is just crazy. Unless you can get it all in early, there is just no way to make money. HU is only worth it at high levels.