Umm, you don't use a phase just one or twice. Unlike dice and ln2, phases can be used like hsfs as long as you give the compressor a break each night or so
And unless if you didn't know, you can scavenge a lot of the parts from air conditioners and what not, so much for spending $300 on a compressor
I don't plan to spend over $200 on this, there are ways to get things done without spending a fortune you know, I've even seen it done for under $100 (of course that guy made his own evap too. That's total bs that you can get someone to build you a phase with worthwhile parts in it for $500, you'd be lucky to get it for under $700 for a custome one, the cheapest I've ever seen is under-the-ice selling a custom one for $720, but that's a stipped down one pretty much.
I really want to see you come up with a $500 professional made phase, no seriously, if you can, that could offer a nice option, but, considering my friend works for an ac repair company, I can get just about every part I need from him for either free or ridiculously cheap, as I said, I don't intend to spend over $200 on this