let's go tankless

Winter time is here ok? Cannot be avoided we all going to chill if taking a shower without the heater.What more convenient if we try using or buying tankless water heaters,does anyone knows that we can have a tankless water heater at home? Instead of using the traditional way,putting or climbing up in the attic to get to the tank,why not buy tankless water heaters for a change? If I were given to change our water heater here,why not go for it? That is for free? But that it is impossible because nothing is free in America. Go look,shop for tankless water heaters who knows you may like it than the old one you used.