Bodyweight only
Pushups, squats, lunges, planks, step-ups on a stair. No equipment required, just floor space and maybe a mat if your knees care about that. This alone gets most beginners through the first two months just fine.
That's roughly what a solid pair of adjustable dumbbells runs, about the same as three months of a mid-range gym membership, except they don't expire and nobody's hogging them.
Okay so I did the math on this one, because that's what I do. Working from home means my "commute" to a workout is walking to the spare room, and once I actually sat down and compared what a gym membership costs over a year against a basic home setup, the home setup won by enough that I couldn't ignore it. This is the version of that research I wish I'd had before I bought anything.
There are three real tiers here, and most people overshoot straight to the third one before they've even built the habit. Don't be that guy.
Pushups, squats, lunges, planks, step-ups on a stair. No equipment required, just floor space and maybe a mat if your knees care about that. This alone gets most beginners through the first two months just fine.
A pair of adjustable dumbbells, a set of resistance bands, and a doorframe pull-up bar. One-time cost, covers 90 percent of what a home lifter needs for a year or more.
National average for a mid-tier gym, before you count the drive, the parking, or waiting on the squat rack somebody's using as a phone stand.
The failure mode I see most isn't laziness, it's going too hard too fast and being too sore to move by Wednesday. This is the sequence that actually sticks.
I spent way too long reading gear forums before buying anything, so here's the shortcut. This is roughly the order I'd buy in, not the order things look impressive in.
None of this is complicated, but I watched myself do at least two of these before I course corrected.