[Buying, looking for builder] Hiring a Housing Builder for my Island

I'm new to this and I don't know how to do this but I googled it and got a little information about how to do this. What I understand is I pay a person Emeralds for the service, I'm not clear about what type as it was confusing due to how it was saying it. Back to the build. I want something small but not too small, normal sized family home with a rustic look that combines the fantasy look of the server into the build if you understand what I mean or am wanting because I'm not even sure what to envision for how it would look. We can talk about it and discuss it and negotiate. I will provide what I can but I think I will stick to paying emeralds for the most of it all. Thank you in general even if you don't take this on or if I'm in over my head because I don't understand how this works or something.