Chances are the information is already out there and in a database.

Does anyone know of any database (or website) that allows a landlord to report a "bad tenants", i am not talking about credit agency. just a simple database that allows a landlord to report a tenant that caused damages or did not pay rent?

There are two power systems, battery operated or hard wired, which allow the meter to communicate with a wireless router that sends the data to a database at the company (this is accessable to you the owner/property manager via the web) and then a bill is sent to the tenants automatically at a interval that you set.

Anyone know where to get a good list or start creating a database?

Your database should consist of individuals, friends and family members that already "know you, like you, and trust you".

Even sophisticated folks rely, at best, on databases like CoStar and REIS which hardly provide any big data analytics.

pro tip:  check out the credit pulls database. 

I want to upload the say, excel list, or add them to a database with a date entered, and link up to some type of direct mail house that knows that:- Each uploaded list will go through a series of 6 different postcards/letters.

I have not found a database of current grandfathered properties, but that would be awesome.

Hey Tate, here's what my commercial lender @ US Bank uses for pro forma debt coverage calculations if he doesn't have 2 years and YTD historical data (basically, seller's schedule E's)Vacancy: 10% of gross rents, unless there is sufficient market data at the bank's disposal to justify lower vacancy rates for the type of asset in question, OR detailed historical vacancy data from seller.Management: 3% gross rents or actuals, whichever is higher, with property management agreement provided to close.Cash Reserves: 3% of gross rentsTaxes: Actual data used.Insurance: 3% of gross rents, or as shown by insurance policy.Operating reserve: 20% - 25% depending on the type of asset and amount of historical data provided.