The hard bit is getting across the herring pond from Canada to Scotland
via Greenland and Keflavik. You will need ferry tanks and survival kit plus a lot of weather luck. Icing is a problem even in summer.
Plenty of light aircraft have done Europe to SA in easy stages.
Avgas can be a problem but it is doable with proper planning.
Ask the professional ferry pilots for advice.
There will be a lot of customs import/export paperwork and visa grief to organise in advance.