While down payments and principal payments aren't deductible, inspection fees and other acquisition costs can be added to the property’s basis for depreciation.

Where the title company is also the escrow company and Attornies do not do closings generally speaking on low end SFR type deals.If your buying multi million dollar commercial many times buyers will engage an attorney in those I just closed on last month like that I was a principal  and my wife was the Broker.

Did they suffer loss of principal during down cycles (or even up cycles for that matter). 

i.e. single proper Buyer agreement, exclusive buyer agreement, etc.Does the principal broker her a signed agency disclosure with this party?

They analyze components such as cash flow, principal paydown, appreciation (both home and renovation), initial equity, depreciation, and interest deductions for tax savings, giving you a clear picture of individual gains and ROI over 30 years.

mortgage principal will remain in the future

Yeah, I get the infinite banking principal and see many others leveraging the concept. 

Know and understand what a closing statement basically is.. and who the true principals are in the transaction.. 

Not paying a friend's principal + 20% interest + points is what RAD is doing.

Penny Penny, PLEASE take a moment to go to the Syndication FORUM here on Bigger Pockets and read the innumerable stories of investors who have had their distributions stop shortly after investing, lost principal, or now have their capital tied up for TWICE as long coupled with no distributions.