Hi, this is something I very much wanted to do a couple of years ago. We were either going to buy an existing kennels or buy somewhere to build a kennels. Unfortunately neither option worked for us. If buying an existing kennels, be aware that it may be valued on a 'bricks and mortar' basis, and therefore you will need a large deposit. The kennels we wanted was for sale at £450k, but was valued at £300k which was just the land and buildings. The mortgage company told us that as we were buying a service it was nigh on impossible to value, despite having very healthy books. We then looked at our other option but that would have proved very costly indeed - the new kennel regulations are very strict.
A good website to get started at is www.kenneldesigns.com. It does mainly cater for people wanting to build new kennels, but has links to other websites, including kennels for sale sites.
Another good idea is to speak to the local council. They will let you have their criteria for kennel registration.
Good luck to your daughter!
Louise