Here in the Jura we have snow and temperatures well below freezing from Nov to Mar. 12 steres should see us through one winter and into the next - may even manage two if winters are mild. During Feb we may light our second fire. Ours are Jotuls, the spare in the living area is a beautiful old one, the central one (open plan downstairs with dining area open to the roof) is clad in soapstone so acts as a storage radiator when the fire dies down, and heats all three floors of our house on its own. We usually wake the fire up each morning by removing some cinders/ash and adding kindling then smaller logs, and add big ones only when we have flames.
We fitted two large Elnur storage radiators in the living area and hall, and a small one in each of the two first floor bedrooms, all heated during heures creuses, mainly to maintain a reasonable temperature when we are away (aided by electric towel rails in the bathrooms), but they run throughout the winter and remove the need to light a paraffin stove on a cold morning before the log fire takes over.
Depending upon logs as primary heat source for the whole house has worked fine so far but I may not feel so keen in fifteen years time or if I lived here on my own. We build a large log wall in the rear garden when the wood arrives, use the quad pickup to bring enough logs round from time to time to stack under the Savoyarde balcony in traditional fashion, then use a large trolley (which Phil made from a rescued supermarket crate carrier) to bring two days' logs indoors at a time.
Should add that our steel flue is not insulated and rises unhidden through the stair well, so helps to heat each floor. The top floor has no heating and is always a comfortable temperature even in deepest winter.
The only modification we may make is a fan in the roof blowing warm air back to the ground floor, using a VMC unit effectively in reverse.
btw we also have an air-air heat pump with outlets above each storage radiator but this is only used in spring and autumn as when temperature outside goes more than 4 degrees below freezing, it's frankly useless and uneconomical.
We did consider oil-fired central heating but the initial installation costs came to more than 30k€ and we decided to spend the money on logs and electricity consumption instead!