Does a horse really need a horse blanket?

[Kutay]

I'm debating on purchasing a horse, the climate that the horse will be boarded in has very hot summers and mild winters(maximum -2) but mostly above freezing.Now I was taking horse riding lessons in the north Dakota region, and the lady that was training me had 60 horses on a 120 acre farm, temperatures there could even hit -40 celsius, and she said there's never the need for a horse blanket if you dont trim their natural winter coat, and it seems like shes right.My question is, if I let the horse keep its natural coat once autumn hits and keep it that way through out the winter, will I even need the horse blanket? I was told its poor training to get the horse used to a blanket in the winter, and that the horse requires proper shelter from the wind/rain, abundant supply of water and portioned meals through out the day.I am looking to buy a horse in the Punjab region of India and have a caretaker take care of the horse for me, I plan on getting 2 mares as they wont get bored and will keep each other company. I plan on visiting a reputable stud farm for a few days in the area and learning more about the horse feed they use, and other things that differ from the west including training.Please help with any points you think I should consider and any tips someone could give. I have been taking riding lessons for about 2 months but have stopped due to schedule conflicts.