Look for some BP instructional videos by Brandon Turner.

There are many hidden risks and hidden costs in tax sale.

A couple sources I found via Google:https://www.redfin.com/resources/how-to-sell-your-home-without-an-agent-fsbohttps://www.biggerpockets.com/forums/311/topics/227800-for-sale-by-owner-fsbo---step-by-step-guidance-neededhttps://www.biggerpockets.com/blogs/5547/40017-selling-a-house-through-fsbo-hidden-dangersI think you have to do the risk vs. reward here.

This gives us free use of the funds not used as a DP (Step #1)3 - Loan is placed in Escrow Account with instructions to be released, upon acquisition of NNN investment, as follows -     A - DP money goes directly to NNN closing     B - Balance of Original Loan is released to REI (me)   Note:  This only insures there is an investment existing that covers the debt(s)...not that these debts will be paid...yet.4 - NOI from NNN property goes into the same Escrow Account, with instructions to be released as follows -    A - Pay the DS on the NNN   B - Pay the Interest Payment on the Original Loan   C - Pay the Credit Partner (if any)   D - Pay the REI (me) what is remainingThis is a Proactive Risk Control, that actually secures the payments to the Original Lender, without using collateral.This frees up the balance of the Original Loan/Cash (not used for NNN DP) to be used...and re-used, as many times as the REI needs to...without cost.

These are all hidden expenses to the contractor.

Always verify wire transfer instructions in person or by telephone - no e-mail or other media.

Say initial investment was 30k, can you add the hidden 2500$ saved in taxes to whatever the income earned on the property was to find the ROI for analytical purposes?

Most importantly, the package comes with a 19 page instruction PDF that walks you step-by-step through his lease to make sure you're using it correctly and following AZ law. 

An interesting topic that was brought up during the show was the concept of "Hidden ROI".

There was no fuss when he was given proper instruction on how to handle.