Recommended coolant type

I too don't have to worry about freezing temperatures. My car only comes out on nice days and it is garage keep so it never gets below freezing.
So here's how to keep it simple keep it cheap. One $10 bottle of Redline water wetter and four 1 gallon jugs of distilled water from the supermarket for under a dollar each.
The water wetter is your lubricant and anti-corrosive and obviously distilled water keeps the minerals and bad contaminants out of the system. I didn't mean to cyber spend $14 for you but I'm sure it's better than most and we'll get the job done better than anything mentioned. Or you could follow the Yellow Rose and spend money. Just wait till he tells you how much the oil he uses cost.