Just don't agonize over the process too much. Trying to get it cheaper and going to all methods and the end of the world to do it all for virtually nothing isn't worth the hassle imo. If you're getting a killer deal, (which can sometimes be impossible to tell) - and the situation feels good, my advice is usually just 'go for it'. Or just do it and get it over with. Think about the spa, not the money. This money, is money invested in yourself.
After all, a hot tub is a physical thing, it gets old and deteriorates with age and wear. It loses value 'the moment you drive it off the lot'... in car speak. Buy it, enjoy it, and forget it...
Every day expended trying to get it cheaper is another day you don't enjoy in your new tub. Life is short.
