I would recommend focusing on markets/sub markets that will provide a more consistent return so take your time and be careful in the areas you're investing in.Personally I prefer the middle/southern part of the country because the price points are much lower and the laws are landlord friendly.

In fact, I recently wrote a book about this that explains the laws in California, some of which are nationwide laws.

If you can prove he is living there (which can be difficult), you can then serve her with a notice to quit based on your state's laws. 

Check local regulations.First, verify that your local zoning laws, HOA rules, or condo bylaws permit renting your property.2.

My understanding is that there is no federal housing law in place that speaks to this, unless I get an FHA loan potentially.

Know and obey the law.

Duplex can always add additional units via the ADU laws. 8) Related to number 1, purchasing a property with an existing ADU is cheaper than buying a property and adding an ADU.

But you need to learn all about landlord/tenant laws, how to do basic repairs, know what average labor and material costs are for common projects. learn about payment systems, how to interview property managers, tenants and handyman services, build a team of realtors, contractors, title, hard/private money lenders, inspectors, appraisers and soooo much more. 

A streamlined process for cost segregation studies: AI is able to help streamline the cost segregation reclassifications by analyzing and identifying property components into their appropriate useful life more efficiently than traditional methods.The ability to identify eligible tax credits: AI is able to sort through and analyze a vast amount of tax laws and regulations in order to attempt to identify potential tax credits available to the real estate investor.

ALWAYS have written tenant screening procedures that comply with local law.