Concatenation Function

I have data in columns A2 through BK2 and I want to concatenate these into one cell. My problem is I need a comma and space between each concatenated item.

Example: If I have John in A2, William in B2 and Doe in C2 I want to concatenate them but....

instead of looking like this:

JohnWilliamDoe

It would look like this:

John, William, Doe

Is there a simple way to do this other than make a new column full of spaces and a new column full of commas and concatenating those between each cell? The way I have it setup I have placed the columns of spaces and texts but I am going to have to do =CONCATENATE(A2,BM2,BN2,B2,BM2,BN2,C2........all the way through BK2. Surely there is a simpler way or am I stuck?