Jeb and co. are still on their way back from Duna and I've already built a 2nd Duna mothership. This one is twice as big and had to be sent up in two launches, plus 3 tankers to fill it up and the lander which carried the crew. In total, it cost half a million kerbucks to construct.

The lander can refuel with the mothership and will land on Duna and Ike. It has a big cargo container and I built it with enough delta-v to carry over a ton of payload. I'm now realizing I should've filled it with parts to construct a rover on the surface, but too late now.

>>544571418
Consider adding a cupola or something to the front. That way you can carry an engineer to fix your shit and you'll still have control in case the probe core loses contact with the KSC.