Ok, what you need to do, is start with an empty community 'no visitors allowed' lot. There is no lot designation for rabbitholes. Then, go into build mode. There is an icon for 'community objects'. Under the 'buildings' tab will be all the rabbitholes, including the stadium, hospital, science lab and school. You will need to use the cheat 'move objects on' to place them, especially if they are too large to all fit, or if the ground is uneven. Place the rabbitholes that you want on the lot, and decorate it how you like with pavers, plants, tables etc. Now you will have your own custom lot with the individual rabbit hole/s as well as the combined ones.