Takes me an hour or 2 to write a song from the moment of inspiration, at least the ingrediants for a song, melody,verse chorus, bridge if needed & a backing instrument , usually an acoustic guitar or piano for me, sung & played live.
Then another few hours on vocal phrasing & figuring what words in the lyric aren't needed to say what I wanna say. Less words the better, people talk way to much. hehe
At that point if I have a good song I would rather someone else sing & produce it, I have no trouble arranging & producing other peops songs but mine. well just a bit too picky I guess,, because there is no one around to say 'OK enough is enough' things tend to be un finalized.
Like who likes a finished song anyhows, no one, but at least it's out there. Or should I say at least the unfinished version is out there.
Short awnser,, ,If it doesn't come together quick, it may not be worth the effort. I've spent years on some ideas just trying to make a tune from an idea I liked sitting at the kitchen table with an acoustic guitar & a voice , the good ones kinda don't take a lot of work, they just happen.
So now all the work is in not wrecking what you wrote to begin with. & round & round we go.