It costs more to live the same lifestyle you had from your home country. If you cook and eat local food, don't indulge in expensive imports, use fans instead of aircons 24/7, drive a moto and not a car etc. Too many expats move out here and live in expat ghettos where it is expensive. Move to an area that is at least 10km from the nearest Western Style coffee shop and you'll find it's a lot cheaper. Sadly, two weeks ago a chain coffee shop opened across the street from the university where our office is, so there goes the neighborhood....
As for electronics? Stay away from ecosystems like Apple, they are expensive everywhere. Twenty years ago, our Thai office used Macs because we needed to run Japanese software that only ran on Macs. We needed to go to Penang (in Malaysia) to buy new Macs or get them fixed. But the prices there were about the same as in Hong Kong. Was it as easy going down to Golden Shopping Center in HK? No, but life was a lot more pleasant and overall a lot cheaper. We moved shop to Phnom Penh five years ago and haven't had any serious problems running a cloud service here except for the power outages.