The blueprint costs include only 246 space platforms - 110 of which are included in a space platform starter pack for a total of only 136 to send up in cargo rockets. Resources are directly inserted into the hub and there are combinators that prevent the system from backing up. 90 space science per minute are produced by this blueprint.
There are no production or utility science pack requirements, so it can be used quite early in the tech tree.
This blueprint also includes a requester chest with all of the materials needed to create the blueprint so that you can efficiently launch them with cargo rockets. The entire space platform can be created with as few as 6 rocket launches (including the starter pack).
EDIT 2025-07-06: I have created an improved version of this blueprint. The main improvements were made through the addition of combinators and the elimation of the sushi belt.