Building Yun Tal first what to do when you don't have money for BF?

I have many games where I back and don't have 1300 gold to buy bf. But it's ok, I can buy the 600g AS item and maybe even the long sword. Ok but now there might be a fight bot and I am very low and have to recall on 800-900 gold. Is the correct thing to not buy anything and wait for 1300? Because it feels very bad. Especially if the opponent already bout bf or is building something like collector which has cheaper components.