If we're talking about anything, you can build a turbo Gen 4 LSx swapped Foxbody Mustang for very cheap (check out the sloppy mechanics group). The same goes for an automatic AWD DSM. Both of those have the potential to get into the 8's with little money, but it does take some fine tuning.
However, I'm assuming you are interested in brand new production cars. The cars I listed above are all old and do not compare to the Tesla in anything other than drag racing. If you're interested, let me know and I can go into a more detailed breakdown of the last car I tuned (LSx swapped Mustang).
As for new cars, it depends on how much work you're willing to do yourself vs paying a shop.
Here's a link to a newer 5.0 Mustang with a completely stock engine and a ~$8500 twin turbo kit. He does have other supporting mods (tires, suspension, torque converter) that likely put him over the $10k mark, but you can also save a few thousand on the turbo kit by piecing it together yourself.
"He estimates the car makes over 900 horsepower at the tire, but what really matters is the stock Coyote engine paired with an off-the-shelf Hellion turbo kit added up to an 8.6-second e.t. at over 150 mph."
https://www.svtperformance.com/2015/04/13/feature-quickest-s...
