Traveling to outerspace is easy or should be easy, weather you want to travel in a STRAIGHT LINE is the question and how much debri you will leave in space or sea is the second question...

Very easy...Take the most powerful Engine of the heaviest, most powerful plane (is horizontally), And positioned it, vertically, make ontop very strong metal so it will not harm the pilot and a capsule for 1 or 2 astronauts/people And you should get there...The only thing is that is going to be in 1 straight line and put stabilizers and something that will keep it going in a straight line and you should get there.....

If 1 engine will not do it, 2 will....just make sure you got lots of gas.....

have you seen how much 2 comercial plane engines carry a plane with all that weight...Take the weight off and put 1 man only...