My builder uses Houzz Pro to plan the timeline and give detailed estimates and daily updates with photos of progress, and provide invoices at pre-agreed key points in the build. This made the whole experience much more efficient and stress-free.
Sumo Twin over Double Bunk Bed by Maxtrix Furniture.
Made of Solid Maple Wood and tested for 800lbs.
Both Beds can be later reconfigured by adding or removing attachments.