Is a major lack of DD a red flag?

[Christina Luton]

We are under contract for a motel/rv park that is a value add site. Seller has not been able to provide any due diligence including contracts with long term rv tenants, proof of income in any way, proof of any expenses and now proof of insurance. Is this lack of available information normal? Should it be a red flag for any reason? TY for the feedback!