Don't even think about sinking money into that Murano.
If you want something on the larger side, I'd also recommend a Toyota Sienna, or, if you prefer SUVs, a Toyota Highlander.
If you want older but luxurious, the Lexus RX 330/350 can be had fairly cheap with around 100k miles. If you prefer a new model, the redesign came out in 2016, so 2015 and older models have dropped in price.