So, here's the challenge.
The idea is that you make a big ship (approximately 400 tons or more ), that can carry 20+ Kerbals and you have to launch it to LKO in one piece and then reach low laythe orbit in 200 days, land by some means (no limitations) and then get back home in 150 days.
Rules: Full stock (Expansion allowed), No cheats, Have Kerbals in medium or large living spaces (No external Command Seat voyagers)
Good luck and may the Holy Scott be with you!!!