>>5847085Sure, that's half the work a weekly mangaka puts (mostly monthly publications are also twenty-something pages).
When I worked releasing a webcomic, it was hard to deliver more than 1 page a week because I'm lazy as fuck and didn't enough money from it (chicken and egg problem, I know).
However, in total amount of hours, it took me from 4 to 8 hours to finish one page, so 20-40 pages is not unthinkable.
That included drawing the rough sketches, making 3D backgrounds (mostly recombining stuff I already had modeled or simple geometric shapes), drawing the characters (style as complex as your average manga), coloring both characters and background (mostly cel-shading, but some painting on BGs sometimes) and lettering. Around 4 to 9 panels per page.
The only thing I had done beforehand were the thumbnails and, of course, the script.
Time yourself, make a short project of about 20 pages that tells a full story. You might be surprised. On my passion project I started at 4 pages a week until I lost steam. On a simplified comic I did as an experiment it took me 2 months to draw 12 pages.
A comic I drew without writing any script, just winging the story as I went, got about 3 pages a week until I lost interest and it came to crawl (finished at around 80 pages).
Another "wing-it" comic I had attempted before never got past page 2.
All the math in the world won't matter at the end of the day, unless you have passion OR a boss that won't let you miss deadlines. You can try being your own boss, I fail miserably at that.
