Layout for half-letter paper with a black-and-white layout. Readable in low light.
Use public-domain artwork rather than photographs to enable printing at very low cost.
Incorporate errata.
Confirm whether playtests are actually playtests, specifically the Racial Traits playtest.
Formal magic rules must be included in the rulebook.
Sell the base version at cost. Possibly have a premium version that is sold for a profit.