Keep it simple if you are keeping the carpet in the dining and sunken lounge, you would just have to shampoo the carpet under the dining when it gets grubby.
If your carpet is in good condition you could
Keep the carpet in the sunken lounge, tile the rest.
Take up the carpet in both areas and tile.
Then have two large carpet rugs made from the old carpet for under the dining and in the lounge. cheers
siriuskey
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