If they're all large they will be a breeze to steer clear of. Large snakes are lazy and slow creatures. It's not like the movie Anaconda. Moving all that blubber isn't easy.
That machete will come in handy if any of the snakes get aggressive but they are generally fearful creatures that don't like confrontation.
Unless you spend time with them you won't know this. Folks are trained to instantly fear them. This almost reminds me of how stereotypes work...
As far as them sneaking into a house and being there from the jump....who's to say there aren't snakes in your own houses right now? Because you don't see them? Don't hear them in the walls? If you have a rodent problem around your house chances are very high snakes are scoping out your crib. They might be in there right now.
You might never see them for years because they have an exit from the house that you don't readily notice. They can fit in pretty small spaces. Evolution has been kind to them. And I repeat, they don't like confrontation so they aren't seeking to be in your face.