While not really a budget tool per say, I’d recommend checking out Beancount if you are looking for a power tool and you are comfortable with a bit of Python. The only really manual steps I have in my setup is downloading transactions from my banks and categorizing any transactions that the machine learning plugin fails to categorize.

Fairphone 5 has 5 year warranty. Sure that’s not 4, but the title makes it seem that 4 is longest out there.

I have had basically no issues with my setup: Edgerouter 4 (overkill, had a lower end Edgerouter earlier with no issues except the power adapter died, other hardware was fine). Some pretty basic unifi AP. As well as some cheap dumb gigabit switches. Can basically fire and forget them. Relatively easy to do most things I need on it. Never needed a reboot outside of upgrades. No stability issues, unlike basically all other home grade all in one stuff I have experienced in the past.

Fairphone because I want it to last 5+ years without any annoying repairs.

I import my transactions into Beancount, a plain text accounting software, a few times a year. My setup uses basic machine learning to classify each transaction. This gives me a decent understanding of my situation when combined with Fava, which visualizes the data.

Each month I save a set amount of money automatically into a few different index funds.

I make sure everything that is a monthly payment is something I actually use. Only one streaming service at a time, cheapest phone service etc.

I keep an eye on my main account every now and then to see how much I have. If i feel like it is stacking up more than what I may need in a short amount of time, I either buy more index funds or put it in an account with interest on it. If the main account ever runs out of money I have done something wrong.

I would say I don’t really budget. For me I do not feel the need. I am by no means rich, but not spending money on wasteful things really does a lot. E.g. make food most of the time instead of eating out, cut your own hair, only buy things that last and do your research before buying anything significant.

Please keep in mind I live in the EU and pay a sort of salary insurance so I do not have to stress a lot if something were to happen to change my situation.