In a rental house it would scare me. What if upon a inspection the land lord doesn't like the stress it's placing in HIS house and orders you to take it down. Before I spent $$$ I would cover my bases. Moving it won't seem like so much fun after you move it the first time. Not to say you can't do it, but I am exhausted thinking about it.
If it was your house, I would recommend you have someone look at the floor unless it is concrete poured on the ground. This is not only a lot of weight, but it's a tall aquarium that will concentrate more weight to a smaller area. This ain't no 55 gallon.