Neat Idea but I've heard rabbits can get bad diseases and Parasites from being kept on the ground. Rabbits can be the King of their bunny kingdom with this easy to make rabbit tower, they can shelter underneath too.
Spacious outdoor run from weather-proof timber with hinged mesh roof and small sleeping house Spacious Outdoor Rabbit Run Grande House - 4 Sided Item No. offers your rabbit or guinea pig a generous run and a saf. Rabbit Runs and Rabbit Pens
(Not into guinea pigs but holy cow, amazing!)Now, THIS is a guinea pig house from heaven! My girls would be on piggy 'Cribs' if we had this.and I will be begging my husband to let us have this!I found 'Cute Guinea Pig Cage' on Wish, check it out!