The club's debts are reported to be in the region of £10m.
Ridsdale told BBC Spotlight that the "signs were that the money was coming on this occasion".
However, he added: "But we'll have to wait as we've been promised money on a number of occasions previously."
Meanwhile, in a statement, non-football staff said they were "prepared to go the extra mile to play their part in the survival of a football club which they are have in their hearts and are proud to represent."
They added: "The staff support a swift resolution to the financial problems for the benefit of Plymouth Argyle Football Club and therefore urge all parties to work together assiduously to bring about a speedy conclusion to the current situation."
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