He didn't particularly seem to be reacting much at all outwardly to the offer. Even without the helmet there wouldn't be much expression, just part of his nature. The venture carried with it more risk than usual with an unknown element. However it could prove to have a short term profit boost, and if this Michael was up to snuff it was always good to know a few people to take on larger jobs.
"Seems reasonable. Tell me the job, and the equipment you have already."