The biggest obstacle is finding good sources of material (more on that where appropriate). Another major problem may be the finding the machines needed to do some of the work. I have been lucky in that area since friends of mine allowed me access to the machines I needed. This should not, however, scare anyone from starting this kind of project. Lack of access to machinery may be overcome through more time consuming work with hand tools. Where actually required you can get help from a local machine shop for a limited cost.

I hope that names of the different selections explain enough (if not, go in and check just in case it might be useful). Please take a look and be inspired to do something yourself!