.| I know the fundamentals of how to design a letter and postcard with a proper message.However I dont feel a newsletter, market Updates or similar materials are useful for multi family owners.

If you are building them right (cost and design), you should be able to get 20% equity upon appraisal and closing.  

I work for an engineering firm that designs a lot of marinas.

Calling all interior designers!

The key is figuring out what the design concept is that you are going for for the house.

You can A spend hours and hours on the web watching hour and a half long videos, be clueless of where to go, get sold a training that costs 5k plus (for information that you can learn on the web for free if you look hard enough, bigger pockets,crinoline, youtube, google, reitipster, ..the list goes on forever.

We started investing while my husband was active, the demands of military life were a huge motivation for us to design a life that aligned with our interests and values. 

My parents bought a property for my sister,, the cost of the house, lot rent, taxes, she never paid,, but an accounting was done where those amounts were kept track of and were deducted from her inheritance, they had other properties also but this was one way they could provide for her, have control of that asset for taxes, and still designate it for her after they died. so you could set up something similar maybe if your in-laws knew the benefits of this estate planning. 

Philadelphia's website: http://epay.phila-records.com/phillyepay/web/It's not free.But there's property.phila.gov as a one-stop site for pretty much everything else.

I believe those systems are only designed to be installed below tile flooring on a small scale.