And, because you can also use the rotation of the Earth in the same manner I can take off from Earth and circle the sun and land again. if the craft is light enough. Which is possible with the current materials.
The "ship". Doesn't even need to have very much propulsion. Most is used for course correction. Human pilot is going to be needed though rf signals wouldn't be able to reach the area I'm going.
The Earth is moving very fast relative to the sun. So initial velocity is high. Why can't that be used as a base to then vector off the Suns gravity and change that potential to a chosen vector?