I need some help. I am being given a schmatic with ~25 IC's, a dozen different FET's, and hundreds of resistors and caps. The engineer that created the schematic created ann new parts with schematic decals byt did not create any of the footprints. How do I estimate how long it will take to find/create all the missing footprints and assign them to the parts in the schematic? I do about 1 board a year so I do not have a large library of footprints to pick from, will probably need to create some. I will also have to go through each datasheet to determine the package that is needed. Anybody have a good rule of thumb for doing this kind of schedule estimation?