How much can a farm produce?

We have a guy on our server that has about 9 gathering farms that are usually K31. Now his progress has been a little too fast. Just recently he has made a K39, a meatwall and claims to spend 30B+ rss each month. In addition he’s now saying he can go K40 immediately. This is like within a span on 2-3 months.

Now I find that very suspicious since his farms aren’t automated, have no QJs and probably not much gear or refines on it since that’s an expensive endeavor, especially for the farms. Getting this amount of rss from farms that are not even K35 each month seems quite far fetched even if he had some Koreas on them.

He claims he’s not a coiner but his monarch level seems to go up a little too fast.

My question is would you say this guy is lying?