What is the point? Are you going to take it off after summer and store it some place? Good luck with that. Are you going to take it off a put it somewhere else? Does that other place have the same size windows?
We take that crap off all the time. The clarity is terrible, the heat and UV rejections are sub-standard, so where is the savings? Money spent on re-usable window film is money thrown away. Get good film done right and you will never regret the expense.