How about a site for Gypsies and Travellers.
They may be able to raise a significant amount of money between them. We know they like Marple, evidenced by their occasional residence at Rose Hill station. And they would bring extra business to the local shops and public houses.
Marple could be seen to be helping to seek an end to racism and discrimination against Gypsies and Travellers, whatever their ethnicity, culture or background, whether settled or mobile, and to protect the right to pursue a nomadic way of life.