If that is the case, then you have to find all of them (not an easy task), and serve them with the quiet title paperwork.If there are other issues or defects in title, like if any of the defaulting taxpayers had judgments or liens against them, then that can add to the complexity. 

Does anyone know of any portfolio lenders and/or small banks that offer non-conforming investment property mortgages with 30-year terms?

I am paying to put in signage for my office/retail tenants because there isn't great demand for those spaces in our market.

Right now the retaining wall has 1 window and a non-glass door that looks out into the backyard.

I've been speaking to several lenders for a few years on residential multifamily and 25% down is the minimum I've ever been told for non-owner occupying.  

Some Ie s/judgments have to be renewed every ten years, not sure if that applies to irs liens.

For example:Single family: You will probably be more limited with financing on a single-family because it will have to be a non-owner occupied loan (unless you try and rent out homes).

This is a building can be built virtually anywhere (almost any residential zoning, and in a number of non-residential zones). 

I have started investing in multi-family, non-owner occupied, and have set up LLCs for those, so I am familiar with the LLC process. 

Åsmund Ryningen You should start by educating yourself to get familiar with the space.