This spacecraft must have the capability to land humans on various planets and moons in the solar system. (Mars, Moon, Titan, Europa, .etc)

I doubt I would design one like NASA has designed Orion. Supposedly this new capsule holds 4 astronauts in about 350 cu.ft. which is small for the future of space travel. The great item about the Orion is the Escape Vehicle: it can yank the Orion free from any harm in 3 milliseconds. In my readings about the capsule in the recent past and I just bought a new magazine last night about the Mars trip in which the the new Rocket is described and the assembly of accessories for the trip; no author that I have read describes a vehicle in which the capsule can in transit detach, turn around and dock with a Mars trip habitat vehicle, as in a larger place for people to stretch their legs. I even emailed NASA, no answer. I’m left thinking that astronauts are meant to sit on their butts for literally months, which is impossible. Also, NASA has stuck with bringing astronauts home by doing a splash down like all the early capsules. Passé. BTW, I understand the desire for a water return, as in it is less crowded, but the desert SW can be equally barren. And the Russians have figured out and perfected the last tenths of a second retro rocket firing to slow the capsule down a lot before it hits the ground.
Now Boeing has designed a capsule that is capable of a land return and carries 6 astronauts. My vote is for Boeing. It is nearly ready for testing this year.
Okay, my turn. I would have a larger vehicle to stretch the astronauts legs and it would be reusable and stay in orbit either around the Moon or Earth and the departure point would determine where it would be parked. It would also stay in orbit around the target planet or moon in order to allow the lander vehicle described next to land.
I am not convinced I would have a “capsule” as such; more like a fueled landing pod. To do a return to Earth the vehicle would have a disposable aeroshell for high speed atmosphere travel and after most of the speed is burned off the shell can be dumped, perhaps recycled. The protocol is to use rockets to land, but parachutes are planned as backup. The orbital unit will be large enough to hold required fuel and extra aeroshells.
For other planets or moons most likely the rockets will suffice. The vehicle will require large landing legs and pads to ensure the lander doesn’t tip into a crack or hole. By this time of building an AI will be used for flight control so stability will be good and environment safe.
This ship system will use exploration drones on the different planets and moons; use different types for different environments.
That’s my idea, just need to flesh it out. I need about $20 billion from NASA (maybe less) and we can go.
EDIT: About parking the larger crew transit activity vehicle or whatever it should be called.
Probably should park all future space stations and vehicles such as this around the Moon until we get a handle on space junk around the Earth.