Hello good and clever people of Tildes, I need some advice.

With electricity the price it is, and my wife having a sizable workshop in the garden, I'm looking for ways to bring down the heating cost.

Her workshop is 5m x 4m x 2.2m, and the wood is 44cm thick. It's a chunky beast. She makes gifts and personalised items, so when she has the heatpresses and mug/tumbler press on the go, it gets toasty. If the sun comes out, also toasty. However, over night, it gets super chilled, almost to whatever temp is outside. To combat this I decided to use a Govee Electric Space Heater, 1500W with Thermostat, WiFi & Bluetooth. However, this barely does anything and the electric usage flies up.

What are good options here? The office is about 10 metres from my house. It's too far to extend the home central heating via plumbing, plus too much lagging. I don't want to spend a fortune, so any sensible options I'm willing to entertain. If we're talking a couple of thousand, it's off the menu.

Thanks for any help.

Dropping an edit with a link to the actual cabin: https://www.tigersheds.com/product/the-gamma-44mm-log-cabin/

It's not like a USA style log cabin, that's for sure!

Edit 2: Okay - wall insulation looks like the next thing to tackle before even thinking about heating it. Thanks folks.

I'm in England, this is going to matter with this.

My wife's business has outgrown a small office space. She does HTV clothing and accessories, mugs, etc. Basically, personalised vinyl and sublimation. The equipment she uses is large, A3 printers, dye cutter (Cricut but about to get an A2 bad boy) and probably an A2 printer too.

I've been looking for 5m squared log cabins and similar. Something like this would be an ideal shape. One wall, floor to ceiling, will be dedicated to storage of vinyl, mugs, t shirts, etc. hence thinking there's no point in going A frame style.

I'm assuming 15cm deep concrete base by whatever size the cabin will be, squared, plus 30cm to make sure the base is big enough.

Thoughts?

Do I build something myself or spend out on the Lego cabin style everyone seems to be selling in 44mm timber? Do I put in the base and build my own cabin around it using straight timber and sheet materials from merchants?

There's two main factors for me, cost and insulation. As she's using it for storing clothing it needs to not get damp so it'll need to be a good material and probably will need a dehumidifier in and on all year round when the door is closed. Do I sheet in layers with insulation foam?

Anyway, you get the idea. Links and general advice is welcome.