Hard money scenario that size, you either need to a) find a mortgage broker that'll do you a solid and send it to a HML that she sends a bunch of business to, who will do her a favor, or b) private funding.

And each buyer in turn will spend way more than necessary on due diligence until a sucker who doesn't perform due diligence comes along and buys this property worth way less than it appears.I'm wondering if the Real Estate Commissions in the involved states (NJ for the property, CA for the auction company) allow this kind of non-disclosure?

I'll private message you.  

I spend the time to research and find a "reasonable" investment, read the disclosures, then begin the contract, offer (all cash), and earnest money scenario.

However there is no reason to involve a Realtor unless they bring you a buyer or a potential deal.Shoot me a private message if this piques your interest. 

A private investor is not likely and hard money is not my preferred route.

Considering the holidays and people spending more money on parties and gifts, I was wondering if this would make it too hard to sell the property/would drive the price down due to lack of activity?

If agents know that the investor is calling a bunch of other agents they are less likely to spend time trying to work for you, because they may invest a lot of time with no return.

Spend some time looking around, and set up with the keyword "turnkey" in your notifications.

Where do I spend my money to get the most bang for my buck come appraisal day?