A stock craft made with 217 parts.
Can do a Jool-5. Has 2 spacebikes for Vall/Bop/Pol, a xenon tug, a 2-kerbal Tylo lander and a mini SSTO for a Laythe lander.
Requires careful flying. I made it back to Kerbin with barely 250m/s left, using aerobraking.
It may say that there are missing part modules, such as Kopernicus Solar Panels.
My Jool5 Mission with this craft is here: https://imgur.com/a/IrDZUu0
Built in the VAB in KSP version 1.6.1.