They can't make a withdrawal because they're not a listed account holder. 

I believe we are in real danger of being overly regulated like Denver which will shut many investors and STR owners down so I'm asking any stake holder to keep an eye out and plan to attend the council meeting when it's announced and speak in favor of STR's. 

From our traditional bank 1st mortgage holder we can get an option of a HELOC with a 1-year fixed rate advance with a rate of 3.235% fixed for 1-year and then a fixed rate of 5.5%.  

Them being not named/served is problematic, as like any other junior lien holder, they have to be named and served to be “wiped out”.You might have to reopen the foreclosure suit after buying it, amend the foreclosure suit.Obviously, ask a local RE attorney that deals with title issues. 

The HA will then determine if they can pay your rent based on it being reasonible compared to other comparible non-sec 8 rentals and affordable for this particular voucher holder.  

They will be the #1 lien holder, as they are putting up 80%.

See below bullet 3. https://www.irs.gov/irm/part55.12.5.2.7 (06-07-2016)Amount Necessary to Redeem Property In any case in which the United States redeems real property under 28 USC 2410 or IRC 7425, the amount to be paid for the redemption is the sum of allthe following: The actual amount paid by the purchaser at such saleInterest on the amount paid by the purchaser calculated at 6 percent per annum from the date of such sale until the anticipated redemption dateIf applicable, the amount of a payment made by the purchaser (or successor in interest) after the foreclosure sale to a holder of a lien senior to that foreclosedIf applicable, the amount equal to the expenses necessarily incurred in connection with such property after the sale but before redemption MINUS the income from such property and MINUS a reasonable rental value of such property (to the extent such property was used or allowed to be used by the purchaser)

He mentioned that this was the sweet spot because many of these note holders at that point are ready to cash out for various reasons.

Could you suggest as buyer/holder/land lord what are some details I should read up on or some specific questions I should be asking.

Particpate in a trust worthy syndication or become a note holder.