Conventional wisdom often ignores the fundamental factors that drive the market. In this model, we will attempt to analyze the market based on simply three variables:

earning growth
dividend yield
change in the price-earnings (P/E) ratio

Our belief is that as mysterious as the stock market seems, its returns may be determined by just two simple returns; fundamental return and speculative return.

Add them together and you have the stock market total return.

Investment Return = Fundamental Return + Speculative Return - (1)

The first term, Fundamental Return, is determined by adding Earning Growth and Dividend Yield.

A deed is a legal instrument used to grant a right. The deed is best known as the method of transferring title to real estate from one person to another.

Historically under common law, for an instrument to be a valid deed it needed five things:

Fee simple is an estate in land in common law. It is the most common way real estate is owned in common law countries, and is ordinarily the most complete ownership interest that can be had in real property short of allodial title, which is often reserved for governments. Fee simple ownership represents absolute ownership of real property but it is limited by the four basic government powers of taxation, eminent domain, police power, and escheat and could also be limited by certain encumbrances or a condition in the deed. How ownership is limited by these government powers often involves the shift from allodial title to fee simple such as when uniting with other property owners acceding to property restrictions or municipal regulation.

1) Buying multi-units are more costly. For example, a duplex out of state may cost $300K and up, a 3-plex $400K and up and a 4-plex $600K and up
2) need more deposit 
3) Multi-units generally does not appreciate as much as Single Family Homes (SFH) and condo-hotels
4) Multi-units are generally not new and are located in less than desirable neighborhoods
5) Renters generally of lower quality than SFHs and Condo-Hotels
6) To achieve maximum profitability multi-units must be fully rented on all sides, which does not always happen
7) Multi-units may cost more to maintain

Many investors who have purchased in recent years with typically 5-10% down payments are having negative cash flow properties.  One way to offset that is to purchase positive cash flow properties.  However in order to accomplish this, one would assume they would need to put 20% down to accomplish positive cash flow.  However, most single family homes such as Austin, TX, Alabama, North Carolina, Oklahoma, Mississippi, Vancouver Washington, Boise, ID, Branson, MO, Colorado Springs, CO can only achieve a break-even cash flow with 20% down.  The reason is slightly higher interest rates and rental markets not keeping up with rising appreciation in these areas.  The exception are Condo Hotels in Reno and Orlando.  With 10% down in Reno and Orlando Con-hotels you should break even and 20% down should achieve at least $200.00 monthly cash flow.