^ I agree with this estimate. It sounds insane to some but it's what you have to work towards if you want to put out content fast enough to keep people interested and invested in your material. ESPECIALLY if you're doing a long form. Speed is one of the things I'm going to be working on for myself, because the biggest thing holding my business back has been not being able to produce fast enough.
I think in cases like this it helps to go in with a buffer. No matter what you're creating (novel, comic, short story, etc.), certain tasks inevitably slow or speed up production and people have different working cycles. Consistency is more important to maintaining a consumer base, so if YOU are not a consistent producer, build up a few chapters before posting to give the illusion of consistency.
I also think there are generally different expectations from the public between comics and writing. You may have more leeway in public perception than we do. Writing often feels a lot more dense and fulfilling because it's not as quickly consumable like visuals are.
Continuing the convo a bit on @niah146's post, Here are a few comic artists I have talked to and how they got to full time (though some of my details may be off because it's been years since I've talked to them, and some things are from observation/announcements after following them for long enough):
Tracy Butler of Lackadaisy. SUPER HIGH QUALITY art and writing, low production speed. She gained a huge following by starting on DeviantArt and just posting updates when she could, often with months in between over a near 10 year period. She's one of the few people where others were so enraptured by her stuff that they were willing to stick around and wait. It's my understanding that she was a concept artist for a demanding game studio for a long time, hence why it took so long between updates. She eventually got picked up by a small webcomic publisher (4D Entertainment) and he produces and distributes books and merchandise for her. Royalties weren't enough though, and she was only able to go full time after launching her Patreon, which remained steady at 5-6k a month before fees last she had the amount public.
Ashley Cope of Unsounded. Also super high quality art and writing (like, some of the most in depth and creative I've seen. Her world building and characters are STELLAR) with moderate production speed. She updates 3 full color pages a week only on her website and maintains a decent buffer. I don't remember if she's always done 3 pages a week, but she honest to god just posted consistently for 5 years, did a Kickstarter for her first book, and has been able to live off of online book and merch sales ever since. She does a Kickstarter for a new volume every 3 or so chapters, goes to a couple conventions a year, and now has a Patreon to supplement her income. She's strictly independent and when I asked her about publishers was like "NAH DON'T BOTHER, KEEP YOUR WORK." (not that phrasing but equally as flippant)
Mad Rupert of Sakana. To be fair, she does a lot of other things too. Sakana is a traditionally made, B&W comic strip that she updates 2-3 times a week. It's my understanding that she gets most of her money from comic freelance, but Sakana still makes some money off merchandise and books I believe. She goes to conventions here and there, has a decent Patreon, did Kickstarters... and within the past couple years, started publishing with Hiveworks. They're a middle ground between a traditional publisher and being independent--they are generally more hands off and don't affect your content, but they also don't provide funds upfront for books. They do give you a website, manage your Kickstarters, and do some marketing for you. She reported being happy with them last I asked.
There are so, so many others of course, but these are the ones I'm personally a fan of that I reached out to. I'd encourage you to reach out to some of your favorites as well, just don't be offended if they don't respond! They're usually pretty busy.