@ Rae. Out of curiosity I quickly browsed a few YouTube videos and in most of them the oil filter was easier to access than yours (they were more like what The Gonz said in his post above).
Example:
You mentioned:
Also the filter needs a 27 mm socket. I was surprised at the odd number.....how many people have a 27 mm socket laying around? Just us tool nuts!! 
The above two 27mm sockets are from my roller toolbox, I think I have the same again somewhere in my track toolboxes (now well stored away and sadly no longer used).
If you intend to buy a 27mm socket but are still worried about clearing that plug connector, you maybe could use a 1/2" sq.dr. wobble extension which might offset the angle of attack on the filter enough to avoid the plug connector.
I've posted above a short 50mm L wobble extension and it would need a normal extension bar added to it to reach the ratchet. Or, you could just use one long wobble extension up to the ratchet.
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