Rimuru meets Hagai Colton and asks to be taught how to be proficient with Smith's Tools, he also asks to work for Colton as an apprentice.
Colton agrees, and offers a pay of 2gp/day for an 8 hour workday and a commitment of 1 year, he also agrees to be Rimuru's mentor for 1gp/day. The pay doesn't include food and lodgings.
Rimuru agrees to the terms and decides to live a modest lifestyle for the duration of his work.
He will sleep in Ace of Clubs and work in Colton's Smithy during the day.