If you are setting up a home office and you have a fixed amount of money, the order you spend it in matters more than the total. Here is the order I would use, and why.
The mistake almost everyone makes, me included the first time, is spending on the visible things first. The monitor, the camera, the light, the microphone. They are the fun purchases and they are the ones you can show people. Then the money runs out and you sit on a dining chair for eight hours a day.
The order below is built around one idea: spend first on the things your body touches for hours, then on the things that stop you wasting time, then on the things that appear on screen. It is boring advice and it is the advice I would give my brother.
01. The chair
FlexiSpot C7 Max
The chair is the piece you are in contact with every minute you work, and the one people delay longest. In Queensland a full mesh back is not a luxury, it is the difference between a chair you use in February and one you do not. If the budget only stretches to one good thing, make it this.
02. The desk
FlexiSpot E7 Pro
Buy a sit-stand for the motor and the frame, not the tabletop. A slow or wobbly lift means you stop using the standing function within a fortnight, at which point you have paid extra for a fixed desk. The top is the bit you can replace later.
03. Somewhere to put things
Orbitkey Nest v2
Sit-stand desks almost never have drawers, which is a problem the desk itself creates. Something that closes beats something that is just a tray, because closing forces a decision about what belongs on the desk. If your desk already has drawers, skip this one.
04. The surface
Journey ALTI Play Desk Mat
A small purchase you touch every hour. It gives the desk one consistent surface and stops a mouse skating on timber. Easy to overspend on, but the gap between the cheap version and the good version is one you feel daily.
05. Air, if the room needs it
Levoit Core 300S
Only if you are in a dusty room, a hay fever house, or working near where a baby sleeps. Check the replacement filter price before you check the sale price, because over three years the consumables can quietly cost more than the unit.
The Kropp Take
Spend on the chair, then the desk frame, then everything else. The gear that shows up on camera is the last thing to buy, not the first, and nobody watching has ever been put off by a plain desk.