I have web hosting experience. Hell, I have GUROchan hosting experience, having run this site before it was passed to you. A site of this size can be easily operated out of pocket at under $20/month. 200 GB NVMe, 2 cores, 4 GB RAM, 100 Mbps would be more than enough. You just need to avoid overpriced hyperscalers like Digital Ocean.

If you do ads, DO NOT CENSOR CONTENT just because the advertiser wants you to! And have you considered supporting donations via cryptocurrency? I would donate.