If you are in CA and have a supercharging station either near where you live or on the way to or from work, I would say fusc would be worth more than the $5K. Otherwise it is probably better to take the money amd charge at home.
Here is some basic math:
Assuming 250wh/mile, and $0.30 per kWh averaging increase is power price. Factor in 90% charging efficiency and vampire drain of 5 years.
5 years = 5×365 days = 5x365 = 1825 day in 5 years. Assuming vampire drain of 5 miles per 24 hours and full charge is 310 miles, you are using 5/310 = 0.9677% of the 80Kwh long range pack. Or 1.29kwh everyday.
Total vampire drain over 5 years is 2354.84kwh
Taking into account charging inefficiency, you are looking at: 2616.487kwh
Total cost for 5 years due to vampire drain:
$784.95.
What you are left with is what you can use the drive the car.
$5000 - 784.95 = $4215.05 for driving
This means you can charge up to:
4215.05/0.03 = 14050.18 key
Again assuming charging inefficiency, you are looking at only
12645.16kwh used to driving
Using 250wh/miles,
Then 12645.16/0.25=
50,580 miles before breaking even.
So you can see it does not take much to break even for the $5K if electricity is expensive like it is here in CA. Now you will have to factor in the wait time which is worth something to many, but if you can find things to do while waiting then it is not all that bad.
However keep in mind if electricity is cheap or you have solar which lower your electricity cost, then it can be a lot longer before breaking even. Even at $0.15 per key, you will probably have to drive 120K miles before breaking even.