My saas app expenses so far

It's been several weeks since I started working on a side-project (themellow.work) and the only expense we had so far is the domain cost.

Hosting server backend (AWS) - $0
Email Server (AWS) - $0
Hosting website frontend (Bitbucket) - $0
Website analytics (GTM, GA, and Hotjar) - $0
Customer support tools (Zoho) - $0
Design and collaboration (Figma) - $0
Documentation (Slite) - $0
Communication (Hangouts and Meet) - $0
Domain - $10

If you're working on a side-project we'd like to know how you're handling the costs.