Captfred,
  I have an annual summer solstice party that includes a LARGE bonfire. The leftovers are useful for getting the flames into the 50-60' range when used liberally. Building on an elevated platform this year to allow more air underneath and hoping for 70-80'. There are probably some places where this would not be appropriate.
  They're also useful for attracting wildlife, from small rodents up to and including bears. Perhaps a "roadside attraction" wildlife preserve could turn into a profitable venture.
   Hope this helps ,  Bill

I`d like to acquire about 200 feet of that Pex but unfortunately my budget can only afford Pez. 

My neighbor was fooling around with solar hot water heat exchangers and made his own `Pex` and it worked pretty well.  He put 1 inch black plastic well pipe inside 4 inch Big-O corrugated black plastic flex duct.  I bury that Big-O in my field as a conduit wherever I need to run electrical cables. I get it in 250 foot rolls and it is pretty cheap.  For insulation he used pink fiberglass batting.  Now this is the clever part.  He was able to obtain a long roll of a clear polyethylene continuous bag or sock.  He slipped this over the pink fiberglass as he assembled the innards.  The diameter of the insulated inside pipe was far too fat to push into the Big-O but that changed after he connected a shop vac to the plastic sock sleeve.  It compressed down nice and neat and he was able to pull iong lengths into the Big-O.  Once the air was let back in the insulation swelled out tight and he had a finished, insulated, direct burial water line.