In looking at your drawing, assuming that was all done in SU and LO, it seems you are very close to not having to redraw it in AutoCAD LT.
Assuming your model is accurately constructed, then it just becomes a matter of styles, line-weights and annotation to create nice looking 2D drawing outputs from your 3D model that can clearly communicate your design on paper. Here is how I overlay annotation on an SU viewport of my model.
In case it helps, here is a thread about line-weights and styles.
As for providing DWGs for consultants and such, here is another thread regarding how to get OK-ish DWG outputs from LO. I acknowledge that this is an area LO could dramatically improve on.
