if this is to be launched from the planet and stored in space it basicly needs chemical rocket fuel, nothing else has the raw thrust required (no not even nuclear, its because with chemical the fuel itself provides both the mass and energy for propulsion, meaning the more mass put in, the more energy comes out, with other systems such as nuclear it uses a reactor to heat a working fluid to produce thrust, thus the more fluid the less energy a givin volume of fluid has and the less efficent the rocket)
a cargo pod of this size would weigh easily upwards of 1000 tonnes, with a conventual rocket system the energy required to put that amount of mass in even low orbit would be on bar with a mid grade atom bomb going off at the launch site
op2 got away with this because it launced the parts in piecemeal, no one part would weigh much over 200 tonnes thus the blast on the launch pad would be limited, as well as the fuel necessary to be carried on board
frankly from an engineering stand point building a reliable launch platform able to lift such a payload would be an extremely daunting task, expecially if it would have to use current launch platforms and have close proxcemity to the coloney (in fact the blast wave produced from the launch would make it nessacary for the launch pad to be many miles away from the rest of the coloney)
even if they are on a planet with a lower gravity and a thinner atmosphere I dont think the coloney would wish to spend the resources developing and building such a rocket if the current systems are reusible and are able to do the same job, albit over many trips
now if the coloney decides to further alternitive meathods of getting into space, such as a space teather, or a mass driver thats another story altogather