I forget the cost of things. Other people have kept better records than I ever could.
Buying the M/S install gear is kinda like buying ham radio gear or hobby test equipment, or new bowling shoes to me.
I'm not even thinking about the cost of the tools, because just a couple of visits from the HVAC man with his vacuum pump, and fancy electronic gauge set etc. Would likely cost me as much as my tools.. I think it was about $500..?.
People who install these things for living, charge as much for install, as the M/S cost..
I've heard of some really high estimates of unit+labor..
More than a few were over $5,000.00 and that seems high to me..
As to the system cost, vs savings? That's not real easy. Because of the mild summers here in MA, cooling isn't normally expensive.
But, our old 14,000 BTU wall shaker sucked up some major KWH in it's day.. Those things are power hogs.. So, M/S cooling beats shakers hands down.
Most of the money we saved was by
not burning home heating oil..
Since 2009, the price of heating oil has not remained steady...
I'm going to guess that having the oil truck deliver 100 to 200 gallons of oil about 15 or 20 times,
(since 2009) would have cost somewhat more than a Sanyo and the tools..