It is simple and goes like this: Purchase a duplexMove into on of the unitsRent out the other unitLive totally free since your occupants pay your mortgageThere is a lot more to find out about partnerships and investing in multi-family residential or commercial properties but this might simply whet your appetite to read more about it.There are numerous things to gain from single-family houses before you must try to move into multi-family houses. Start with single family homes initially and advance in residential or commercial properties as your abilities progress. As you can see there are lots of different methods to fund residential or commercial properties and this list is just a few of them.