Hi,Im new to this site..Thanks for all the good info!!! Questions, We have narrowed down to three spas. Jacuzzi 315, Sundance capri, Hot springs Jettsetter. As you may assume our space is limited. One issue is the only area for the spa to sit is on pavers with a 3x3 open gravel pit! (long story)..Jacuzzi gut says no problem ABS bottom...HS no problem... Sundance, the one we are leaning towards ,not sure...Also whats the greatest difference 110 vs 220? Cost? Power? I understand about heater and pumps at the same time, but do I care with such a small spa?? Thanks for any info you may have