Then consider the amount of time required to handle inquiries, bookings, complaints, cleaning, repairs, credit card disputes, maintenance, questions about how to operate the remote control, dealing with vendors like landscapers, and so on.There's much more to it than just throwing it on AirBnB and watching money roll into the bank account.

You have an opportunity to set you and your brothers up for a bright financial future, but you also have a risk of creating conflict and disputes which are damaging to your family.

There is a process of disputing a discrepancy on the FZD, however, each lender has a different one and it often times will delay the closing.

I don’t know what the process is to dispute valuations in that county.

Realtors need to be able to prove procuring cause in order to demand a commission in a dispute. 

., sales price, responsibility for certain fees, timelines to cancel, responsibility for default, earnest money/option disputes, etc.I think the TREC contracts are a good start -- but that should not stop you from being creative or adding investor friendly clauses/addendum to the contract.

It may be enough to have your attorney send a demand letter for payment of the resolution to these items. 

I just need to know the ins and outs of auctions, lien disputes, and hard cash lender info in NJ to complete most of my research.Also, is there anything else I am missing in my due diligence against this auction fix and flip?

The Seller needs to have a clear resolution. 

Decide on written procedures for resolving disputes (e.g., arbitration/mediation, who will pay costs, what accountant to use, etc.)Since members have different roles, think about how to measure and reward the contributions of each member.