Feasible yes, but not with out a pretty steep learning curve. I started out about 5 years ago with the same intentions to scan, edit and then 3d print.
You are going to need a decent PC with a fair bit of ram.
You will find that the scans are large files, unwieldy and difficult to edit because of the number of vertices. 100 of thousands if not millions.

If you want to go ahead I would recommend that you learn Blender. It is the most versatile and powerful modelling tool available for free. You can import your scans as Stl's and convert them to blend files that you can then retopologize and edit on a manageable scale. This way you will be editing 10's if not hundreds only of vertices.
Have a look at blender and if you have any questions I am happy to help further.