PML depending on the time duration of the loan will either be passive or active income.

You should always be pro active and professional.

If you want to have your own LLC for your own benefit or where every member is active, that is another story.Also agree with Chris that you should consult with an attorney.

There are active tenants in there with an AWOL owner. 

The Fall and Winter months typically see less activity than the Spring and Summer.

The last three properties have been on the market for over a year with active showings but no offers.

She is on a month to month lease.Is it ethical/legal to kick someone out for suspicion of such activities??

I agree with 100% with @Clayton SilvaA general tip: Spend time on income producing activities and ignore most of the rest. 

Here are some factors to consider:SFH: Easier management, typically lower upfront costs, and the potential for strong appreciation in Orange County.Multi-Unit Property: Greater potential for rental income from multiple units, but it may require more active management.

Very different answers to your question depending on the answer to this one.If for a career path, I would agree with @Michael K Gallagher and find a brokerage that is actively doing deals, has a property management division in house, and has brokers covering each of the key market segments - multi-family, retail, office, industrial and land.