You can argue yourself in circles on this one. A few questions:
- How often will you need more than say 70 miles in a day?
- When you do, how often will it be between 70 and 90 miles?
- How often can you afford to hire a car using the cash difference between a 24 and a 30?
- Going on holiday is an interesting one. Are you really going to drive a LEAF30 down say to Newquay in Cornwall from J26 M1?
Assuming that you get 1 mile per %, start at 100% and charge from 10% to 80% each time on a rapid that is 3 charges at around 40 minutes a time. At the same efficiency in a LEAF24 that is 4 rapid charges. Both suffer from overheating of the rear cells, but the 30 is much worse and you are likely to have to wait before charging on the 2nd and 3rd charges to reduce it. Neither journey will be much fun, but if you are determined it can be done in each. Where do you sit on this?
- If you go for a lower spec you'll regret it everyday. The 17" wheels are unnecessary, the BOSE subwoofer worse, but with a small child the pleather seats are useful, and the LED headlights are a significant improvement if you drive in poorly or unlit areas. The heated seats/wheel are available sometimes in the Acenta. Do you need / want these differences for around £800 - £1,200?
- Most LEAF30 are newer than most LEAF24 - there is therefore a benefit from that but not if it hasn't been looked after. Always go for the best battery that you can find rather than the newest or lowest mileage car. Is the reg number important to you?
The answer is personal so you only have to be honest with yourself!
On a daily / weekly basis I'd average about 20-30 miles a day, I'd generally only need to go longer than 60 miles on school holidays for day trips out, so this would only be probably be once a month on average, so if I was going to Sheffield or Birmingham I could easily charge there or on the way back.
As for the longer journey, with this only being a once of maybe twice annual event, I could live with doing 2 or 3 chargers on the way (Going to Devon I'd probably stop once or twice in an ICE car anyway)
I'm a little confused as you say I'd regret going for a lower spec and then say the Tekna isn't worth the extra £800-£1200? I prefer the look of the Tekna wheels, and from sitting in both the cabin felt more 'premium' like the leather and the heated seats. Not sure if the 2016 update on the infotainment is worth it or not?
As far as reg, no, If I can find a 14 or 15 plate with a battery that's been looked after in good health (which I was hoping the one in this thread was going to be) then I'd be more than happy with that.
Interestingly I was recently offered by a Nissan dealer a 16 plate 30kWh Acenta with 35k that was being part-ex'd for a new Leaf for £10,250. Problem was they sent some awful pictures, it was black and gave me no clue of the condition, but those pictures put me off, it was filthy and just looked bad. Maybe worth another look? From what I've seen so far it looks like a car from a main dealer is the way to go, some are even offering £400 deposit contribution and 2 years servicing and warranty!