A group of Druids, appearing as farmers, are roaming a rural upstate New York community, needing the blood of residents to revive their queen. “Invasion of the Blood Farmers” (1972) was made for somewhere between $24,000 and $40,000—roughly equivalent to $185,000-$200,000 when adjusted for inflation. That’s a sufficient sum to create a decent and enjoyable independent film; consider “Another Kind” (2013), which co…