Well if your parents are not funding it.I don't see a real big problem other then it is ultimately their home,and well if they don't want anything bigger there,get rid of some stock.weight can be an issue when you get into those size tanks
Earlier in the post you said that the fish got dumped on you but on the comments for your youtube video you said that you were going to buy an 8 inch spotted gar...Earlier in the post you said that you would be happy with this stocklist, as it is perfect. But in your youtube video you were thinking about getting a turtle when you got a bigger tank. Its a slippery slope. Figure out the biggest sizes fish can get and pretend they're that size when they go in. I'm worried you haven't learned your lesson and are just going to overstock your new tank.