This could be through the provision of free advertising on your channels, the provision of snacks and/or drinks for the cast during rehearsals and performance days, donation of equipment, and providing drinks and snacks for sale (or as a gift!) to the audience, etc.

Volunteer to help in the office, in productions such as backstage or front of house, in fundraising, or marketing.  Offer your expertise in lighting, sound, stage management, costumes, set design, etc.  Become a prayer partner.