Supply lunch at work & dinner at home
Open chain of clubs with gym, swimming pool, squash etc
Drop the children to school
Arrange tuition classes on all subjects
Run hobby classes like painting, music etc
Take care of plants & pets when expats are on vacation
Drop people to airport & receive them on arrival
Door to door delivery of goodies to their home country
Suggest investment plans & tips on share markets
Home delivery of fresh, clean & cut vegetables
Arrange concerts & live music shows
Arrange DJ's & dance party
Ceremonial hall of 5000 plus capacity
Arrange tours & travels
Maintenance of buildings

Inform your capability & investment capacity & you can get lot more ideas