A qualified professional appraiser will generate a comprehensive analysis considering factors such as sales comparisons, highest and best use, market conditions, and income generated following Uniform Standards of Professional Appraisal Practice guidelines.

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.

Even if you're not on the mortgage, your wife might still be affected because of the community property laws.

None of the above works unless you take action and put it into practice.

I am new to BiggerPockets and real estate investing and I am looking to invest with the BRRRR method as I'm currently learning as much as possible before I put this method to practice.  

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. 

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

She can't afford rent, so you get her moved out by the end of the month, then apply her deposit to the unpaid rent, cleaning, and repairs.I may even incentivize her to leave quickly by offering to forgive the unpaid portion of rent if she gets out by the end of the month, but it really depends on a number of factors and I'm not going to ask for details.For future reference, best practice is to have set standards and adhere to them every time.