Or say, an inspector is there to sign off on a roof permit but he sees trash from an obvious tear out of a bathroom out back while he's on the roof...is he then allowed to say, "I'm going inside because I suspect you demo'd a bathroom?"

Have an opportunity to buy a property which ARV is between $85K and 90K. Seller has a HELOC of $65K with payments of $645 a month. The house needs approximately $20K worth of renovations and I believe I can rent it fo...

The two common choices for doing so are the self-directed IRA and the Solo 401k.The Solo 401k requires self-employment activity, but will allow you to take participant loans while the IRA does not.A few other Solo 401k benefits:Compared to an IRA, Solo 401k contributions limits are roughly ten times higher.There is no custodial requirement for the 401k.You don't need the additional expense and administration of an LLC to have checkbook control.There is a built in-Roth component whereas IRAs are either traditional or Roth, not both.A spouse can also participate in the same Solo 401k plan.The Solo 401k has additional tax benefits over an IRA when investing into real estate using leverage.The penalties for prohibited transactions are less severe, though it's best not to utilize this benefit :)With either structure, it's generally recommended that you do not commingle retirement and non-retirement assets.

I have studied many types of Equity structures in a syndication scenario with various types of preferred returns, equity hurdles, and more, however I have not been able to find anything about how a sponsor can buyout the equity limited partner in a long term hold scenario.

Typically a sponsor cannot take 1031 exchange money as that has to be more a TIC or DST structure. 

I looked at a duplex in Denver a few weeks ago that had structural issues and even though it had been on and off the market for 6 months and they had come off original asking price considerably, it still did not make sense unless you could get it 20% under current ask or unless you had a GC that was a whizz at foundation repair.Consider looking at non-traditional MF, i.e.

I remember hearing on the podcast once someone mentioned when they offer they submit 3 or 4 different offers with different financing structures to make seller financing more appealing to the seller. 

Items we need them to inspect and provide quotes on include roofs, HVAC, pool area, landscaping, irrigation, look at building structure, look at the foundation, etc.Thanks in advance.

It still needs an exterior paint job, updated master bathroom, possibly a roof, at least one AC unit replaced, landscaping, and potentially all new windows within a couple years.

If you know how to predict those - teach me.But if you do flipping, the resulting income will be counted for the taxation of SS benefits, no matter how you structure it.