I lived in a studio flat around 8 or 9 years ago that was around 60% of the size of this one.
It didn't have heating, it had a plug in convection radiator.
It barely had any natural light, and even in summer, it was freezing. It was costing £60 a week in electric, all those years ago - that was the summer amount, I can't even remember what winter was.
This is somewhat worse because the kitchen is seperate. Mine was in the same space. How's that kitchen getting heated?
Looking at the proximity of the hedge to the front window, I'd say it'll be balls off cold.
By all means, if you can afford to fit GSH, buy the place - I've seen worse.
If the purchase is to lower costs, assume your electricity bills are going to be absolutely astronomical (idk what that wall heater is or how much it costs to run, but it looks like it would struggle to heat a teabag).
What ended up happening was I (stupidly, naively) kept the window closed all the time, got exposed to a ton of black mould (I knew little about it being a health hazard back then), and I ended up with M.E., which I've been unable to recover from. Imagine having Long Covid forever? That's similar to my world.
So, no. I wouldn't advise anyone buy a studio flat with electric heating unless their purse/wallet for electricity bills was essentially bottomless.