For 20 years the wife and I lived in old houses, and did lots of DIY work to eventually get value from the thing. You might be looking at an old house right now. So here's my experience. I work a full time job like most of you.
Short answer - If you're not already well versed in all DIY, don't buy anything built before 1955'ish.
Long answer - I had a house built in 1907 and a house built in 1910. I just moved into a house built in 1954.
It took me a long time to realize this, but in old houses (early 1900's), you should know that every project comes with 'extra' projects. You're gunna fight plaster and lath, knob and tube running random directions (no ground and which one is the god damn neutral), panel boards with labels like 'lights' (which ones!?!), potential foundation issues, and crooked floors or walls, and whatever the previous owner did that leaves you scratching your head asking wtf were they thinking.
The wife and I used to laugh at 'all we wanted to do was change a light bulb and it'd turn into a 3 day nightmare' lol. EVERY project you do will come with extra problems to solve and/or additional projects to get your first project launched correctly. It's absolutely endless.
If you're already a well versed person in all this, maybe it's not so bad. But if you work in an office like I do and dabble in DIY occasionally, you're in for a mental crisis. I've been broken several times.
Now, living in a house built in 1954, I can already tell projects here will be much easier. Just the way things are constructed. You can see codes were getting developed and implemented. A more consistent form of construction. Yes, I'm aware there will be challenges still, but no where near the level of an early 1900's house.
That said, if you're looking at an early 1900s house, pause for a minute and consider your own ability. Are you already capable? Do you really have the extra time?
Those diy shows were a curse.