When buying real estate as an investment, keep one thing foremost in mind-the more money you make on the property, the better. That said; there are pros and cons besides the obvious financial considerations. Some properties might be more of a headache than they're worth and at the same time, you could pass up a good real estate investment deal by excluding certain types of property.

a. Buy mobile homes and trailer houses when you want to rent them quickly and increase your money flow. The nice thing about buying trailers for rentals is that you don't have a huge initial investment. However, because they are not as structurally sound as homes, there may be more money in upkeep.

b. Purchase small single-family homes when you want an easy-to-rent-out property. Small homes are desirable for their appeal to families with children, so look close to schools. Unfortunately, they are a bigger investment that a renter can harm if you get a bad tenant.

c. Look into multi-family housing if you have a chunk of money to invest. Because you're renting out units, you bring in more per month, when assessed against the mortgage, than you will on a single family home. Unfortunately, they often need a separate manager who lives on-site.

d. Consider investing in commercial real estate when you have at least 30% of the purchase price to put down. Commercial real estate is harder to finance than is residential but the profits can be well worth it.