Mr. Elton, we are told, cared little about Emma's engagement compared with his wife (well, there goes her status as the newest bride in Highbury, and while she might sometimes have taken precedence over Miss Woodhouse Mrs Knightley will always have precedence over her), hoped "the young lady's pride would now be contented;" and supposed "she had always meant to catch Knightley if she could;" and, on the point of living at Hartfield, could daringly exclaim, "Rather he than I!"
So presumably, back when he proposed to Emma, Mr Elton was not contemplating moving in to live at Hartfield at Mr Woodhouse'e expense but expected her to come and live in his old and not very good, though smartened up by him, vicarage? Believe that if you like - personally I can as easily believe that Lady Catherine de Bourgh would dance the can-can.