If a business owner cannot afford that they really need to look at how they are spending their other money or rethink their purpose for being into business ownership (let's not act like people who can go into business ownership are starving here folks).
That line about small business is the wrong way to go about a very good point for the right. Business is not required to use a fixed amount of domestic labour. They can use foreign labour (outsourcing) or capital (automation).
There's a big disconnect here. Leftists have seen low-skill wages and worker rights erode for a generation, yet totally ignore the causes of those problems when assessing government policy. The grocery store won't go bankrupt if the minimum wage goes to $15, but it will put in more self-serve checkouts.
Now, a $10/minimum wage won't affect much, but if the left wants to raise the poor's income much beyond that, they should do it through minimum income programs, not minimum wages.