I've been driving EVs as my commute car since 2010 from the very restricted range Nissan Leaf to my long-range Tesla model 3 and as of this evening, my EV6. I'd say that there is almost no doubt that you'll save oodles on gas and maintenance, unless you pay some ungodly amount for electricity. I live in California which has pretty high electricity rates, but they do offer a discounted night rate which is when I charge my EV.
For what you are doing, an electric car will probably give you zero range anxiety as long as you install a home charger that runs about $500 or so. With something like that, you'll be able to charge overnight even if you are very low on charge when you pull into your garage.
Road trips (let's say more than 200 miles one-way) are the one place where you'll feel a slight compromise ... it will take a little planning, but that's all it is. Most highways now have chargers along the way but I'd say Tesla still wins that one with their incredible network of fast chargers. If you don't expect your EV to be a road-trip car OR if you dont mind some planning around your road trips, (I'd say add about a 30 minute charge-and-coffee-break each 150 to 200 miles) and you should be fine. The EV6 does support fast DC charging but (i) I dont think the availability of those chargers are as common as Tesla supercharges are and (ii) the range of the EV6 is still substantially below those of Tesla and (iii) you don't say where you live, but the range of these things drop dramatically in cold weather. Not a problem in California, but very evident in Duluth, Minnnesota where my brother lives and his commute (and only) car is a Plugin Hybrid.
If you can live with that one trade-off (or if you have a second gas car), I'd say it's an easy win in terms of gas and maintenance for the EV6 or similar EV over a gas car (sorry, don't know the sportage so can't specifically talk about that).
Hope that helps.