thequilterslink had great suggestions and we have done that at our guild.
If it is a new guild you probably do not have the funds to bring in a "professional" speaker. But you may cut costs by checking with other guilds in the area and share a speaker's travel or workshop. But check in your local area there may be someone you don't have to pay travel. Is it taught at a local university or community college. Maybe one of the teachers there would do a trunk show or speak on a topic.
Our guild's main money maker is an opportunity quilt. You may have a sewing to make one for your guild to sell raffle tickets.
Out guild did a slide show where everyone sent in pictures of their sewing spaces....That was very entertaining.
Maybe one of the local sewing shops would do a presentation on machine maintenance.
Just thoughts. Good luck.