As per the article from CAS below, it does require disclosure.

It might mean you can consider slightly higher purchase prices or invest in properties that require more rehab.

Buyers: How do you feel about the requirement for written agreements before seeing homes?

I calculate that a quadplex would make my effective rent $350 below what I'm paying in rent today and when its fully rented it would bring in $700.It takes longer to get the quad but it has a positive effect on my saving rate versus treading water in the duplex which requires me to move to "make" money.

I earn much higher returns than I ever did as a rental investor, with almost no work required on my part.

Does the down payment and income requirements make it difficult for first time or low income buyers?   

Cash flow for businesses require more time which usually means higher returns in $ amount, % of CoC Return is more difficult, and keep in mind your time. my rental takes a hour a month and maybe cash flows $100, $100/hour is nice, but took $60k.

These lines of credit generally have 1-2 year renewal periods and require you to send the bank your tax returns and possibly personal financial statement on an annual basis.In my experience "HELOCs" are associated with your primary residence. 

Self directed IRA keep in mind you need to liquidate the assets at 72 and half years old to pay taxes on minimum required distributions. 3.

As property manager we have the right and the physical and electronic safety guards to capture their SS number if they have one (this required an on site visit to our office to verify that each computer was password protected, that we had locking file cabinets etc).