The limit of fields per collection is 30 normally and 40 with business hosting. For more limits, you can check out @samliew’s awesome post here.
- Max number of fields per collection: 30 ( 40 with business hosting)
Without knowing the specific needs of the project, have you tried to look into Reference Fields or Multi-Reference Fields to get around the limit?
Edit: Pinging @Oscarneu so you see my response as well. Cheers!