How about eighteen arhats at home?

Yes, you can. Lohan, Buddha and Bodhisattva are usually placed in the study and guest room at home. I'll popularize it for you by the way:

Bodhisattva statues at home are also a convenient way to increase our faith and confidence. But if you put it at home, remember that there are three places that are not allowed in order to maintain respect and respect for Buddha and Bodhisattva. One is the bedroom (with love between men and women), the kitchen (with oil smoke) and the toilet (with foul smell), so the best places are the living room and study, and some people put them on the porch. , these will do. As for orientation, there is no need to pay attention. You think it's good to be serious. As for those laymen who pay attention to orientation, it is a misunderstanding of Buddhism. If you think that the Buddha and Bodhisattva should pay attention to the orientation of placement, how can you talk about infinite magic! So don't confuse faith with superstition and custom.