up vote 0 down vote. You can nest up to 7 valid or invalid entries. If you need to have more than that you should perhaps designate a column for your black list of entries that you can add to when an occurrence causes a count that you don't believe should be valid.
So how much does a float tank cost? Float tank prices vary widely depending on the size and the features of the float tank or pod you want to buy. Expect to spend anywhere from $12,000 to $40,000 to buy each commercial-grade float tank needed in your spa.
How much does it cost? On average, a floating dock can cost anywhere from $18 to $30 per square foot of space that is used. On the site RollingBarge.com, it is stated that you should set aside $24 to $30 per square foot. The piling types of dock can be around $35 to as high as $60 per square foot for the initial cost.