In addition to the powers conferred upon an authority by other provisions of this chapter, an authority is empowered to borrow money or accept contributions, grants or other financial assistance from the federal government; the Commonwealth; any locality or political subdivision; or any agency or instrumentality thereof; or from any source, public or private, for or in aid of any project of the authority, and to these ends, to comply with such conditions and enter into such mortgages, trust indentures, leases or agreements as may be necessary, convenient or desirable.