It doesn't address the weight for summer use, but to address the cost of dry cleaning you can get "dry clean at home" kits on Amazon: Woolite At Home Dry Cleaner, Fresh Scent, 14 Cloths
https://www.amazon.com/dp/B00JIRB0FU..._O-bGBbWZBEBD5 for about $20. I've used them in the past and was satisfied with the results