I have never seen this kind of "rent" in BC. My water tank in BC has no problem for more than 14 years, It was replaced last year. Builder here save the money (your purchase price does not include the water tank, you have to rent from other company. When I purchased house here, I strongly required NOT rent tank, so I paid installation fee and provided equipment (tank), builder installed it.. Normally a tank can work for more than 10 years, a lot saving. also it is very easy, Call home deport to replace it if there is problem after 10 years. As I know, this builder did not let customer choice again after I purchased house. If you can, just buy one, not rent.