quick question

Some of the smaller boas. i.e: hod island and so fourth? will they do okay in a 3ft long cage by 2ft wide/deep cage

In my opinion and experience, a 4x2 is the best option for boas much over 5ft (then obviously very large boas should be in 6x2's or larger). Most female Hogg islands will exceed 5ft, though males may not. It depends on the individual. In other words, depending on the gender and subspecies of boa you're looking for, a 3x2 could work.