Linking And Formatting Cells With Numbers And Text In One Cell?

I have one cell with $20,000 hard coded (cell A1). In another cell I want the cell to say "20,000 Capital Raise" (cell B1). And i want B1 to link to A1 so that if i change the number in A1 it will also change in B1.

Here's what i have in B1 so far: ="$"&J6&" Capital Raise"

This produces "$20000 Capital Raise" in cell B1.

So the only thing i'm trying to figure out is how to get the comma in the $20,000 so it will read "$20,000" instead of "$20000".