air fryer to save money?? Am i 'on point' or 'off the mark'?

[SoTiredNeedHoliday]

Hello,
I am considering getting an air fryer instead of using the oven. So I've got a few questions:

• will this help with energy use?
• are they any good for roast veggies etc
• I'm generally only cooking for 2 at any one time (yes I choose to cook at different times to suit everyone)
• Any recommendations of good ones?

Ours just have saved us money, it's the same wattage as our non fan oven & less than the fan oven & everything takes at least half the time to cook & no preheating.

Ours was £58 from Costco so we'll definitely earn that back over its life time.

Two adults & 1 child, we can cook enough for us three in it, woukd be easy for two people