I want to direct mail owners of 4-plexs in my area, but am unsure of how to get their personal addresses. 

You can use a friend, but they must have a physical address (not a PO Box) and be available to receive correspondence during normal business hours throughout the year (ie. you need to consider what would happen if they go on vacation).

Usually if it's a business or LLC that owns the property the webpage will list the address of the property which is sometimes the LLC's owners home address.Hope this helps!

I called and got their address and went to the building. 

Will go nicely under the original front transome that looks to have the original glass with the address. https://www.flickr.com/photos/32911628@N08/39497291385Numbers:Fix up: $98,000Purchase: $104,000Total investment: $202,000ARV: $235,000Yearly.

Buyers will need to get a personal property loan, just like a loan for a car or a boat.I expect that tiny homes will be a depreciating asset, not subject to appreciating values like stick-built homes on owned land.I think the best application for tiny houses is to address a bonafide local housing crisis - especially for a group like homeless veterans.  

One of the units in my 6 family is withholding rent this month over claims repairs have not been addressed, but the tenant at the same time is refusing access to the apartment unless they are home/present.  

If you are just renting it to them as extra square footage and storage, I don't believe you have to address that issue. 

@Nereida Moreno I have sent a colleague request to you as I can't see your email address to sent you the workbook.

A property like what I am visualizing (large hole in roof for years) may require several different issues addressed such as remediation, abatement, etc. these issues alone could make this a very bad investment and it's not a good way to start.