You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
That's was my thought as well. The new 75D is so well optioned at this point, but given this is my first EV I thought I would throw it out to the experts.
I just went through the same analysis and went with a new 75D.
You get the latest (until it's not) but most important, the new car gets the new car warranty.
It all depends on price, options, age, miles and condition of the CPO. It may also depend on what range you actually need (if 75 requires large sacrifices in terms of charging mid-day).