The “motherboard” is also V specific so they have to make that before they do the final assembly. I’m involved in less complicated electronics manufacture and there are lots of different steps as the various sub assemblies that make up the final product are put together. Eve must have scheduled orders with various suppliers - CPU, ram, hdd, display, casing, PCB, battery, etc as well as Emdoor to assemble/test the PCB then do the final assembly. My guess is that Eve is trying to make sure that they can sell units to use up the parts they’ve committed to.
The original working name of “pyramid flipper” is somewhat ironic - at this point it may be a bit of a pyramid scheme. But lots of businesses start off that way until they can build up enough working capital to keep stock. It would be difficult to get that much working capital quickly - 1000 V’s at $1000 ea is $1M… Heck I know of a local company that didn’t have enough units to meet their orders when they were starting off. The boss would go to a customer, tell them their unit need to go back to the factory to be updated then promptly install it for another customer for a week or so… rinse and repeat until they had capital/stock, Obviously that’s not ideal and is nothing like what Eve is doing but it moved on quickly from that start and has been in business for 20+ years now.