I had an adult female Tenodera sinensis that spent a day roaming around on my bed, and she did not wander much on the bed. (This was unintentional. I kept forgetting she was on my bed and did not put her away. I am glad she did not lay an ooth on my bed!) I would strongly encourage using a native/naturalized species, especially if you are going to have “lots of plants.” The reason I think the plants would pose a risk is because the mantis could hide an ooth in the leaves. Also, using an un-mated female mantis is no guarantee of infertility. I had a Stagmomantis carolina that laid an ooth which hatched out small number of babies, but I kept good enough records to know that female had NEVER mated. Somehow, this mantis had accomplished facultative parthenogenesis.