There are lots of songs that I write and record half way, to never work on again. Hundreds. For example, I'll likely never work on this song again, even though I could add drums, bass etc to it and make it better. Why? Because I have a tendency to move on to something new each time I put an instrument in my hands. But sometimes I have to force myself to go back and rework a song or finish tracking a song. If I commit to doing it, I can. For me, making music shouldn't always be easy sometimes I need to work for it and often those songs end up being much cleaner and more polished than the ones I record quickly out of inspiration alone.

I know that many writers/artists will have a specific routine for each project. I wrote in a small coffee shop every day when I wrote this screenplay or I only drank Macallan 12 while writing my novella. -This routine and repition allows them to jump back in to the 'voice" that they were using previously. It allows you to return to that "inspired state", it's a trick to fool yourself in to never having left in the first place.

Maybe try something like that? But I don't think you should have to write/edit it all in one weekend. Writing should be hard sometimes.