HOG is a good value with new gear and and provides rather rare support for the DIYer.
But, if you really want to save money, it is hard to beat older gear, especially if you can service it yourself. I dive nothing but older (1970-1990 vintage) Scubapro regulators. Aqualung/US Diver is another good option but it does not offer the design choices you can find with Scubapro. You will not find any DIY support from those companies in the USA; but they are so wide spread and common that plenty of parts and documentation are available if you do some hunting.
Good Luck.