We no longer need huge storage tank to keep warm water inside our garage. We use tankless water heater.
The heater working real simple, they are amazing and maybe the best innovation in this century. Eliminate the uses of storage tank is big difference literally. You can use the former place for your cars or make a dog nest in there.
To get the best product you should read reviews before making a deal. The vini tankless site is offer you that solution, they are have tons of post about tankless water heater that can be useful for you as recommendation to pick quality products that fit with your needs.