What service business is best to start part time ( Help entrepreneurs)

[Chris Lynch]

I am looking to start a service business part time while I work full time so I can save more and in result invest more in real estate/ other assets. My work schedule is Monday- Friday 9-530. So only certain types of start-ups will work. Landscaping seems to be out and so does a bunch of others. 

The few I can think of include mobile window tinting/ auto detailing or a commercial cleaning business of some kind. I need to start a business and take control. If anyone has an idea of a service market that can be started night hours ( After 530) I would love to know about it.