Vivian Beauty Spa

I’ve recently moved into a rental home. After having had a swimming pool for more than 10 years and now none, I’m wanting to buy a portable spa. I’ll be moving to a home in 8 months and need help deciding. Should I get an inexpensive soft spa ($700) one like at Walmart or splurge ($2500) on one like a DreamMaker?

The deck is to be built 4ft above level ground. It is to be 50ft by 30ft and is to contain a spa that is circular with a 14ft diameter. the spa is 4ft deep. /assuming that the spa itself weighs 550lbs. How much water will the spa contain and how much will it weigh? Also, what materials would I need for this project?