Buddhism Offering Cabinet or shelf

hello. I recently did a job for a client that is a buddhist. While at his home he asked me to install his offering shelf on the wall,cabinet securely so it would not fall so I did. He was very generous and kind to me as I worked for him and I did my best work for him and we were both happy.

My question is, as I am a craftsman, would it be acceptable for me to build him a new offering cabinet and present it as a gift?

Thank you.