OK. Stars at War's mapping to point values is this:
1) There are Fleets, Grand Fleets and Bases.
2) A fleet is X points, a Grand Fleet is 2.5*X and a Base is 1.5 * X and must include an immobile unit (we call it a Fortress, use whatever unit your tactical engine of choice supports.)
3) Where you may want to put in more effort (or help us if you'd like to share the work) is mapping the technologies and weapon traits and tech levels of Colonial Battlefleet to RDPs. This is what we're currently doing for Full Thrust, and it's been illustrative. It's not required, however.
There are plenty of strategic layer purchases to make with the RDPs your in-game research produces and they're generic.
If you're jittery about the $5 USD, note that you can pledge to the Patreon and it won't charge you until June 1st. If this doesn't meet your needs, cancel before you're charged. (I have two 'patrons' who seem to do this every two months or so…)
I suspect you'll find enough there that you'll stick around…