A quick looksee tells me that the current exchange rates from USD puts the average CoL in Tokyo at $3500.
Even then 40 pages a month is a burnout schedule without hiring some help because they are not going to allow anyone to draw at the same level of craftsmanship you see on your average webtoon. You might find some kid with stars in their eyes willing to work for $500/mo, but a one man show? Flame out.
If our fantasy company would allow you to live elsewhere in Japan like Kagoshima or Miyazaki where the CoL is closer to $1000/mo and send in your work electronically? Hell yeah. You could even hire someone to draw your backgrounds for you.