There are diffent levels of "work".
If you refer to simple maintenance, Then you might do OK.
However a norton that needs restoration is another mater.
These bikes routinely need custom fitting and "fettleing" of components. This is due to the original specification for parts, being kind of "loose". Commonly available aftermarket parts may not be much better.
Since, their design is so simple, the proper fit of each part is more critical. Many people_do_sucessfully assemble these bikes, but also many are not safe or will not give full service life. Even "professional" mechanics and machine shops sometimes fail to grasp the subtleties of these old bikes and cause more damage than could be believed. Some of the local clubs might provide enough support to allow success. But, the commando had so many changes during it's 8 year run, that there are prescious few really knowledgable people in the US.
Sorry to say but, be prepared to get a lot of bogus information both in person and over the internet and in glossy coffee table picture books. Before you buy!!!!!Join the INOA and your local chapter if in the USA.
Be prepared to buy whitworth tools and a variety of specialty tool to prevent the all to common butchering of the hardware and affected assemblies.
Sorry to be so cynical, but I get to help a lot of the local club members and see all the problems that arise.
With a good support network you might be successful,
(or using tried and true old norton repair services).
Dave's right. How willing are you to manage this bike? Have you taken it for a really good spin? On the bright side, there's nothing in there that you can't do at home, or take to a local machine shop to straiten out. Is this your first Norton?
IS the bike a basket case? If it is all together, go for it. There are plenty of parts available to fix anything that might be bad. I bought my 1975 850 MK111 brand new in Phoenix AZ, have had to do many things over the years, but all in all, it wasn't that bad.
If it's all apart, then only you know if your mechanical expertise is good enough. If you do not purchase it...where's it at and how much is it? Plenty of others might want to purchase it!!