This variation of hot tubs is the most expensive and easy-to-assemble model out of all of them. These tubs are usually made from vinyl or latex and can be placed on any flat and solid surface. Inflatable spa tubs are great for using over a short period of time, as they don’t include a sitting bench and get uncomfortable very fast. If you’re just leaning into soaking sessions, this may be your best option as it’s very simple for assembling, can be transported into different locations and won’t make a huge dent to your wallet.