There is a large list of materials and parts, as well as the need for people willing to help with building (it's a telescope you can't build it by yourself and now that they have this one the research agency he works for isn't willing to pay for more) and an actual location.

Legend reassures him that the Protectorate will cover his expenses, this is very important and might just be the best shot they've had against the Endbringers in a long time.