I think what you have to look at is the total cost, and vaguely your opportunity costs - options at the same or similar price point.
A $16,000 compact car, really loaded like the FFE is, that's a darn good deal. You can't get a Focus Titanium for that little money (pretty close comparison to the equipment in the FFE). And then look at what else you could buy for $16,000 - not a lot out there that is very good.
Resale is one side of the equation - you'll take a bath in two or three years if you try to sell the car. By that time, the car will probably be worth in the $5,000 range - wouldn't surprise me in the least. But then you only spent $11,000 to own the car for that length of time. You can always sell the car at CarMax - no need to search hard for individual sales.
The car has a warranty like any other car. Purchase or lease, you'll get the same service. I've never been asked at my Ford dealer if the car was leased or purchased. Their policy, if you got the car at the dealer, they will provide you a loaner if the car has to be there more than a half day. Lease / purchase - never asked, and I've taken both leased and purchased cars to that service department.
Leasing is sweet - you drive the car, pay for it, unload it at the end of 2 or 3 years. You'll never pay the residual value they ask for, it is way too high compared to a used FFE (same car) in 2 or 3 years. So you look at this as a rental you can enjoy for two or three years and move on afterwards with nothing to show for it.
You could also look at buying a used FFE - 2012 or 2013, and save a lot of money over buying new. Granted the battery is smaller - but not that much smaller. And you don't get CCS - or faster DC charging. But you'd be looking at an $8,000 car that is likely an incredibly reliable car with low mileage. You might have to buy a set of tires, but that's all the maintenance you'll spend on the car.
There really isn't a right answer. At least not anybody here could tell you. The right answer is the choice you make. There is no wrong answer whichever way you go.
Oh - Don't forget installing a charging station at home. You'll end up spending that money. It is far too convenient to not install one, and 120V is way too slow. Nobody but an electrician can tell you how much that will cost. It can be anything from around $1,000 to $5,000. There is no such thing as average or normal price - there are far too many variables to come up with a remotely useful number.
2014 Platinum White FFE (Turning in mid Dec. 2016 25,000 miles)
2013 Ingot Silver FFE
2012 Titanium ICE Focus
2014 Tesla Model S 85