Upgrade! Cheaper to build a horizontal rocket sled launcher using Musk’s vacuum tube rail system on the curved portion of the ramp. Then you don’t have to use as much fuel to launch!
Fireball XL5 is Go!
I've got a 14 year old Excel spreadsheet detailing this. Mine uses a partial vacuum ahead and low pressure behind. Run the launch tube up the western slope of an equatorial mountain.
My main question is how much aerodynamic pressure (MaxQ) the payload cowling can handle at, say, 14,000 ft?