Well, if they could launch and assemble all that ship & luxury, they presumably have the drive technology to match. That second ship that docs might very well

Well, if they could launch and assemble all that ship & luxury, they presumably have the drive technology to match. That second ship that docs might very well be something like antimatter propulsion tug or even something wilder like nuclear salt water rocket. Probably nothing nuclear/electric as no serious radiators for all the waste heat such a system would generate can be seen.