So this was my first project copying the plans for my simple outdoor sink and sturdy work bench. I used the same wood and measurements.
The sink was purchased about 5 years ago in Mexico. Faucet and drain at Lowe's. I took the sink to Lowe's to have them color match the bowl and used the same paint.
I decided to use four boards for the bottom shelf plus one as a back stop. I also had to space the top two bracers farther apart because the sink was 17 inches deep ( make sure you measure the sink first. I made the mistake of assembling the base and finding out afterwards that the sink wouldnt fit.