To the surprise of no one in the future, they will probably be very expensive and come with a smug aura of how he found the ideal equipment, look how accurate this allows you to be, and all the other things that make him insufferable. It's something he can hide quickly in his old job, fussing about how these things matter to do good work, but it's really just being an asshole in a new and exciting way.

"I may not respond immediately, depending."

Which is as much of a heads up for Strange as permission for Alucard himself to ignore the world for a few hours or days if he needs to process whatever happens next. He doesn't know the half of it, who predicts a giant pit with a dragon in it, but Alucard can make a few confident guesses about how wild the world is.

"Which is not personal to you," he then clarifies. "The business is simply taxing."

And dealing with Strange requires an awful lot of patience, which is personal.