> So I went to Blala market, and I saw a nice blue Ford, and I hope that
> it won't be already sold, when I manage to afford its price after few
> months from now.

I feel that I can't say "**when I'll manage to**". But I need someone to explain it to me. 

Also I don't know **when I should put comma after "when"**. I guess it is related to whether the first clause can be understood without the second one. Correct?