Just did a very quick calculation re- his trip of approx. 6 hours+ for the round trip, the purchase of the Air Cooler, fuel costs, time and wear and tear on vehicle, etc. versus buying locally and having installation included in the package.
Fuel, costs between $1.29 per litre and $1.50 depending on your distance from the nearest Capital city, his vehicle has a 2.4 litre 6 cylinder engine, approx,. fuel usage would around 30-40 kilometres per litre Unladen, fuel tank holds 60 litres when full,
but hauling a 6' x4' EMPTY box sectioned trailer would increase the drag co-efficient hence fuel efficiency would drop,
so one way ONLY it would cost an ESTIMATED $77.00 to fill the tank here, then use up an estimated 12+ litres in traveling given an estimated mean fuel price of $1.35 per litre = 300kms divided by the distance = 10 litres, unless I've made a mis-calculation which is possible,
plus another estimated $13.50 to re-fill on arrival, then do the calculation again for the return journey but add in the weight and drag of both the trailer and Air Cooling unit,which would lower fuel efficiency even further so the costs of the round trip alone would possibly in the region of approx. $181.00 + not including costs of refreshments, etc.
A rough guess at what it will cost to repair/replace the damaged panels, etc, = anywhere between $3,500 and $ 5-6,000,
Add in the cost of the Unit at approx. $2-3,000 for a new unit, = a rough sum total of approx. $8, 181.00 where buying locally and having it installed, which is, btw, part of the purchase price the cost would around the $3,500 - $6,000 depending upon the Cubic Feet per minute output of the Unit you've selected.
Definitely, imo, a case of " A Fool and his money are soon parted."