Thanks! Though I did say at the end that I realize my math was assuming you were building an SSTO
Also, I did sort of attempt your idea. Asparagus staging isn't "technically" possible, since mono-prop doesn't need fuel lines, but I did do something kinda similar.
Mind you, I whipped this monstrosity up in 20 minutes....though, 15 of those minutes were trying to rearrange parts and deal with the intense lag.
And speaking of the lag, I was getting about 3 FPS when flying this...and only got to 3,865m
So if I gave myself more time, I might be able to complete this challenge. But seeing that there's not much part freedom (at least practically) and that it kills my FPS so much, I don't find it worth trying. But I am kind of interested in seeing OPs creation....