I see two major problems just from a surface reading: 1. Sending multiple large rockets on a ballistic trajectory might look like a nuclear attack. 2. Landing

I see two major problems just from a surface reading: 1. Sending multiple large rockets on a ballistic trajectory might look like a nuclear attack. 2. Landing a rocket on a flat concrete pad in clear weather is vastly different from trying to land something on terrain while dodging surface to air missiles. I also think the surprise factor is overrated. Any nation state with satellites would be able to spot you moving a lot of equipment around.