In each case, you risk a disadvantageous position. 

Keeping her in the property just increases your risk especially with the current CDC measures in place, landlords are at a disadvantage.  

Many duplexes are located in disadvantaged areas unfortunately, this area was not zoned to support large scale multi family, but I may have another option that could work for her! 

With the market being so hot I am noticing that I'm at a disadvantage. 

Is there advantages and disadvantages to it...

If so, what are the advantages and disadvantages of creating a lease with the person you live with.

Take issue with the government, not the individuals taking advantage of government programs.To not take advantage of government programs that exist would be a competitive disadvantage.

I think this whole idea of investing with zero money is kinda impractical, it implies you're already financially irresponsible or disadvantaged which is going to distort your idea of a good investment and making good decisions as an investor. 

Potential for accelerated depreciation through cost segregationThere are disadvantages, the main one being that they are long plays that take more time for substantial payouts.

You are putting yourself in a disadvantage compared to people going directly to the listing agent.