Actually, you may want to look a little closer at Matthew 10:11-15, which is the scripture that you quoted as being Jesus' instructions to his Apostles to preach 'from house to house'. The cross references to this scripture text is found in the middle of the page on page 1317 of the New World Translation Revised. Jesus instructions are clearly on the finding of lodging during their travels. Mark 6:10 and Luke 9:4 are the cross referenced scriptures.
Mark 6:10: "Further, he said to them: 'Whenever you enter into a home, stay there until you leave that place' ".
Luke 9:4: "But whenever you enter into a home, stay there and leave from there."
I am sure that you are sincere in your beliefs but you must not take what Jehovah's Witnesses say about the Bible at face value. You will find that many here were Bethelites, Missionaries, Elders, Ministerial Servants and Pioneers. Most of the men and women who post here were sincere and devoted Jehovah's Witnesses until they did some REAL research without the distorting slant of Watchtower dogma. Stick around and keep an open mind. There is much to learn from the many experienced men and women posting here.