It's even cheaper than that. I can find an 8 TB hard drive on Amazon right now for under $130. Even overestimating growth at 150 GB a year (so every block around 2.8 MB), that's 53 years to fill 8 TB at a cost of around $2 per year.
You're correct, Leo. Running your node on your local computer is undoubtedly more cost-effective. The reason I used cloud prices is that they offer a more accurate representation of the total cost. Running a node involves more than just 'disk space'; it includes factors like electricity, bandwidth, and wear and tear on other hardware components, affecting their lifespan. Additionally, the heat generated by your PC might contribute to your AC bill. All these small details, along with the host's profit margin, are factored into cloud prices. Assuming a 10% profit for the host, if running your node on the cloud costs $10, doing it locally would roughly amount to $9.