I blog about them here: https://www.biggerpockets.com/blogs/8160/52878-how...In short, here's is why each is important to us:Cash-Flow: helps push us toward exiting the rat raceCash on Cash Return: I want to do better than the market or other asset types; this also helps ensures we don't use more than necessary funds (leverage) to acquire a property...which I believe is the point you're trying to make. 

The only thing I can think of is writing in a rent bump of $X/year, but I don't want to short myself in the long run.

This would probably require a significant hair cut to make it attractive but would end up with the same scenario as #2 - the ability to complete a full exchange.

@Joseph Lee I used to have a lender that would go to 90% LTV, but that was short lived. 

With my other business something may work great for a short period of time and then not at all later on.

My short term goal is to purchase a duplex and house hack it for the first year until I'm able to purchase another next year.

We started looking at single family homes as a plan B and have now discovered that we’re coming up short by a few thousand dollars on a 200k home, with 5% down and paying closing costs.

Long story short, last night I came across a hidden cookie jar behind the towels in the bathroom.

I am hopefully going to be acquiring my first rental unit, a duplex, shortly, presenting offer tomorrow.

To do this I will need to acquire double digits properties; however a family member and I are debating about short term (vacation rentals) vs. long term rentals.