If the company generates 40k a month without expanding, and the break costs 2.8K a month then it is sustainable. But the trips are a clear aid to expansion meaning potentially a lot more revene generation. So it's actually in the interests of the company to do this from what he is saying.
eh, it was 40k for just one month. No mention of previous months and not enough information to predict future months. Not convinced it's sustainable given the information.
Last 6 months have been high enough to sustain this, but who knows that the future will bring. If ever income drops down, then one would simply stop this, and look for solutions that fit the income level.