1) Purge. Clean out every closet and every drawer and either donate, throw away, pack or place tag sale items away.
2) Have a tag sale to sell everything you do not want or need. If you do not want to have a tag sale, then contact an "Estate" dealer who will come and buy everything you do not want. There are people who sell things at Flea Markets whom will take away just about any residue from an estate.
3) Clean your house, make general repairs, seek out a good realtor and place your home on the market while you look for a smaller home to either buy or rent.
4) Enjoy your fantasy of this so called 14 bedroom home. You see, 14 bedroom homes are never built under bridges.