I'd love to know what you research as i am also reading about them.
I'll search whats on this site
I've googled articles about questions to ask re modulars
then i guess there are individual companies, costs, reviews.
I also hope to find someone who knows about them and can shorten my journey with reputable companies and good experiences.
It seems that they will modify designs so designs are just an idea of what they can do .
some claim that 2 people can build then in 4 hours or 30 hours and that they withstand all weather conditions and termites.
I'd love to know more from anyone with experience please.