I am moving to buy a Tesla and although my inclinations are for a brand new Tesla Model 3 or Y I have been ultimately also de used model S or model X. Used maybe year 2017-2018. I am looking for a car no more expensive than 50,000 and to be comfortable for the passenger specially those on the back seat. My wife have 2 back surgeries and my oldest daughter (11 years old) is also having lower back issues. What can you recommend? I will be more than happy to read from those who already have the experience! Thanks in advance.