However the cash flow is derived, you can then set up the waterfall or distributions to the members including the manager and show what the proposed investors net return would be from the investment.

You take the noi and divide it by the cap rate to derive the value.

Probably frowned upon a little bit to provide contact information (personal info) derived from the MLS data to someone looking to market to those owners. 

An appraiser should not have or be receiving any compensation based on the estimated value or outcome of the value derived, that's a biggie!

There are some issues here however.It's falling on the predatory side in residential transactions paying the financial derivative of an option price (based on market value) and then escalating for appreciation.

If you try to derive a value of a 4-plex based on its income your will arrive to 50% of the asking price.

The modification of a mortgage/note & DOT is a NEW extension of credit, just as if you are creating a new loan, that modification must then comply with applicable laws, lump sums can be predatory lending.If a significant amount of your income is derived from dealing in notes, you may not be seen as an "investor" but rather, being in the business, much of this is determined from IRS Code and your active participation.

As long as the interest is on balances that were derived from rental property activities it is deductible.Education and books.

The retainage is to ensure the subcontractors (derivative claimants) were paid for work performed. 

Propane is a petroleum product derived from oil not natural gas so its price moves with the oil prices.In the future there may be compressed natural gas for home heating, but that's not in the immediate future.