Other considerations:-
How are you heating your water ?
How are you cooking ?
Refrigeration ?
These items would suggest that a number of gas bottles will be needed anyway.
How much of the winter do you intend to spend here ?
Have you got firewood available on site ?

thanks everyone:) loads to consider & interesting to see the alternative thoughts.

I'm very much the way of thinking to try a few things before committing to major investment, but I do want to move over to a WB/multi fuel stove rather than the bulky &, most probably, really inefficient open fireplace that is there ATM, not sure if I want/need to go with back boiler, to me back boiler to heat water might be better?? but then I'd need a cylinder…….

at present there are 2 gas boilers, on for the kitchen & one of the bathrooms (I think) & one for the other bathroom & the cooker is gas.

I have been mulling over bringing alternative cooking means i.e. halogen oven, small electric oven, slow cooker, bread maker etc  but again I'm overwhelmed with information, but did discover that the microwave is the cheapest form of cooking!

Fridge is electric I think.

We are over for about 2 weeks before christmas & will not be back till feb probably, so this visit is really to see how we go, but as we are driving down I wanted to bring what i could just in case we fly another time & have luggage restrictions.

I agree with bruxiot.
I brought over from uk a £800 wood burner which I have in my living room. Last winter I didn't use it at all as it is very inefficient and using stacks of wood.
I have in my kitchen a size 2 pot belly type burner, which cost less than 120€ including flue, that uses a quarter of the wood and heats the living room as well if I leave the kitchen door open.
I originally installed a gas fired boiler and radiators which costs a fortune to run and after one year took it out (wanna buy some radiators?)
I have a gas heater in the bathroom, because I'm a wimp and hate the cold
I run a large chest freezer and a large fridge/freezer from my solar  and my water is heated by a gas water heater on demand, about three gas bottle a year.
Cooking is also on gas bottles about 4 bottles a year (I drink a lot of tea)
I find that to run generators is very expensive even with the large diesel genny that I have. Better to spend your money on a really decent solar installation.
Just my experience