Plenty of pool tables and most other stuff on FB marketplace. also doing air hockey, dual pop a shot (basketball), skee ball and a multi-cade.

You also then have create dual entry.Lastly, your bathroom is always the hardest as below-grade bathrooms are hard to permit and hard to do and can ruin your value in the long-run, if it's illegal and done the wrong way.

I wanted to house hack and purchase a property that has dual streams of income.

Also, certain states have very strict dual agency laws and may require the dual agency relationship in writing, which would include non representation. 

That became my dual niche. 

Does not make any sense :) I am one of those rare dual licenses  I have a CA Brokers license ( since 1975) and I have a MLO from Oregon and NMLS registration.

Have to figure in VAR power etc.In addition, you might see a 345, or higher voltage line and the cost to connect could be prohibitive.

This is completely different from creating two LLCs, and there are many reasons you might want to avoid the complexities of having dual LLCs, particularly for a smaller asset, like the one described in this thread.  

You could do that, but some Realtors don't like dual representation, it can put them in a bad spot, so in those instances, you might have you own agent. 

Or do you think more seller's agents will be asked to do dual agency?