$1700 would be crazy. Figure using a 20 lb tank type setup.I got my used c02 bottle for $100 for 3 of them (this was a great deal figure $100 each used),I got a used electronic solednoid for $65 (good deal new aboyt $145) and a timer that goes minute to minute I got mine for $9 (usually $2 then some hose for $10.Co2 is about $24 a tank here which is high. A co2 generator can be bought used for $200 then all you need are propane tanks about $20 a tank. The ppm meter is the most exspensive thing but you can wing it using the math formula and a flow meter