Your town may have a housing rehab program, e.g. https://www.plymouth-ma.gov/community-development/pages/housing-rehab-program

Here are some other ideas:

https://www.theresource.org/

> The Resource, for Community and Economic Development, Inc. (TRI) is a non-profit corporation founded in response to a consortium of town and private sector representatives who wished to more actively and innovatively impact housing and economic development in Southeastern and Western Massachusetts, Cape Cod, and Martha's Vineyard.

https://www.frnbhp.com/