For most individual LPs, direct exposure to the land/infrastructure phase is genuinely too illiquid and long-dated — you're underwriting a decade-plus hold with negative cash flow for years.
The sane exposure is one phase down: the vertical product (apartments, BTR, retail) built within a master plan once the anchor and infrastructure are proven. You get the community's tailwind without funding the riskiest cold-start years. Ask any new-community sponsor whether they'll let outside LPs into the vertical JVs — the good ones will.