I don't own many mobile homes but ran across this in apartments on occasion. There seemed to be two types , the bigger ones ( fly in trees) and the little ones. It was hard to get rid of the little ones. When we had a connected building, all units would be exterminated at the same time.
Ultimately it came down to the people being cleanly, don't leave food out, take out the trash, clean etc. I wouldn't think it would be an issue with going from one home to the next with some amount of spacing but could be wrong. I never had to do exterior perimeter spraying but we try to stay out of the home business where possible.