Do FSE's get time off between long trips?

I'm in the middle of an interview process for an FSE position. Job is listed as 40% travel, but I just found out that most of the trips are 3-4 weeks long for installs. It's also a small company so my service region would be the entire globe.

There's some remote aspects of the job (training, troubleshooting, etc.) that I'm sure would occupy my time between trips. But I'm hoping someone with similar travel requirements could tell me about what their company has them do in those in between weeks.

Are you in the office 9-5? Is there the opportunity to work from home? Maybe reclaim some of your time spent away from family by not working full 8 hour days?

I ask because I am viewing this similar to my father-in-law's job as a pilot. He is gone several weeks at a time, but the time in between is mostly his time. He doesn't both travel for weeks at a time and work a regular 9-5 when not travelling. Is there something similar (but obviously less extreme) in the FSE world? Or am I completely crazy for thinking this?