I bought one of those Halogen ovens advertised on TV - the ones with the hinged lid, they have a timer and a temperature control - though I think they are all digital now. Mine has simple dials to turn. I can do small things or large things - a chicken cooked half the time one way up, turn over and finish cooking - always juicy as it is cooked in a fairly enclosed space, but there is room for a dish of veges to roast or simmer in a dish underneath.
I do have a fair few kitchen 'toys' - a Tefal Actifry, a slow cooker, the Bamix is useful for pulverizing and blending, beating, etc. plus several different sizes of wok. Low carb cooking is not really fiddly - I get different stir fry options from Lidl and always have nixed vegetables in the freezer sometimes just toss a pack of prepared veges into a pan with some cubed meat and add stock and a little thickener, sometimes a dash of herbs or something spicy at the end to give it a bit of zing. I can keep my carbs to less than 40 gm a day but don't feel at all deprived.