I build all my racks from reclaimed lumber, there is a surplus here for free.
I build them 6-0 tall, 16 inches wide, 10 inches deep. The shelves are spaced 8 inches apart...looks like bookshelves.
Each one can hold, let me count.....79 to 90 bottles depending on the bottle size...
With a table saw, i can cut out, and assemble in about 1 1/2 hours.
I use tongue oil to finish.