I just deleted a super long post. Long story short I don't have an answer. Long story long if you want the details I'm retyping to try and keep it focused:
There is no clear answer to this from most toy and hobby grade quadcopters. The ones that are rated for lifting capacity are all well above the monetary budget unfortunately (they are ludicrously expensive). An example of one that has an actual lift rating in the specifications:
https://www.dji.com/matrice100/info
That's a $3200 quadcopter but it is rated to lift 500g or even a bit over 1kg and has rated flight time with those payloads (20min with 500g).
From my other research into this it appears the Phantom 4 can lift over 500g and from a test I saw using a fishing scale with a Mavic it can pull 2.3lbs at max throttle but that probably means it can carry about half of that and still ascend and have some semblance of control. Therein lies the problem with anything that isn't "industrial grade" they just aren't rated or configured to handle heavy payloads and aren't 'rated' for it at all probably in part to save the mfg from liability.
All that said my first quad was a 3d printed frame using 1804 motors (new one uses 2206) and it could lug around a GoPro Hero, video transmitter and extra security cam for the live analog feed. If you took those parts out and added a GPS module and ran iNav software you could have GPS lock or waypoints setup for the quad to fly itself.
Regarding the Xiro it appears hit or miss with regard to the reviews for the product and their website leaves a lot to be desired with regard to putting specs and details on the quads up front. The manual looks well done but aside from that there isn't much information to be had about details of the motors or other hardware that's included.
To wrap up for now the price is going to be tough to hit with either DIY or buying something off the shelf. I believe my little race quad could easily lift the 500g capacity but how well or how long it will fly are another matter. My guess is you'll either need to increase budget to get something larger that won't have any trouble with the extra payload or go with something small like a race quad or DJI type product and just keep extra batteries on hand. Bigger batteries to get longer flight time doesn't really work out since you're adding more weight to the quad and it takes more power to lift that weight (energy density of batteries isn't anywhere near gasoline so 'just add a bigger tank' doesn't really work out if you need to keep the motors running at peak just to get off the ground), in general it's much easier to have more batteries so the quad doesn't need to carry all that extra weight the whole time it flies. On the plus side a few minute demo with a quad will take some setup and tear down time and will be exciting enough to feel longer... usually.
Couple resources to help with technical details if you want to get into that:
https://www.ecalc.ch/xcoptercalc.php
https://quadquestions.com/blog/2017/02/22/choose-right-size-motors-drone/
PS if the weather wasn't so crappy I'd do some testing with my 'racing' setup and see how stable it stays with various weight attached to it and where the limit is really but it's pouring out so I'm stuck inside working on an MPCNC :|
