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.
Two or three years ago, building a DIY sensory deprivation tank at your home was a no-brainer unless you had unlimited resources to spend 10-12K (at least) on a commercial float tank adapted for your home. With transportation and construction costs the sum could go up to 15-20K.