I say this from the perspective of an investor from the UK, but I think the principle is the same.
I would think of this in terms of how to spend £100k / $100k - the actual amount is less important than the idea here.
As a very simple example of my thoughts:
I could buy a 100k property in cash, which would return 8%pa (net rental income) so $8000pa and grow at a rate of 5%pa so $5000pa (ie appreciate in value). In one year my net worth would be $100k +8k + $5k = $113k.
OR
I could buy 2 * 100k properties with 50% down. This would still return 8% pa per property, so $16k. They would also grow at the same rate, 5%, so $10k. The borrowing would cost me 3% (mortgage) per property so $3kpa. In one year my net worth would be $100k + $16k + $10k - $3k = $123k.
Clearly there will be other expenses, and there is always an element of risk when taking debt finance but as investors it is one of our jobs to mitigate these risks by buying well. You could extrapolate out those figures for 5 and 10 years and watch as the two figures diverge. You could also do a similar exercise with higher mortgages (3 properties for example).
The compounding effect shouldn't be discounted and there would be nothing to stop you combining strategies by paying off one or more properties to 'cash in' the gain in asset price to reduce your borrowing on one or more of the remaining.