How do i introduce a "researchfloatmodifier" in an ability file?

i want to rewrite a starbase deployment ability so that the deployment increases fleet supply by 200 units and max capital ships by 1 unit.

My intention is then to design an ability buff that will demand 300 supply to build a starbase (only for the duration of the construction).

All this is part of my dream to build an "improved logistics" mod.

Is this at all possible. I learned how to do all the basic rewriting on the first day. Introducing new dimensions to abilities is proving a tough nut and i`m running out of ideas.