Thee miss understanding about our solar system is big in this thread.
Jupiter... ohhh dear Jupiter. Yeah Jupiter is not an ordinary planet. Jupiter is a gas giant as you stated but it doesn't have a surface.
Some scientists say that you require like 70 Jupiter planets to create a Red Dwarf from our Jupiter.
And about Venus? You will fell a crushing gravitation because of the strong winds ~ 300km/h winds. On Venus, 1kg from eath is ~ 900 kg on Venus's suface...
Sooo DE can't create something realistic because if you put the proper physics is impossible.