Hi even though i have the budget to make my own cnc machine i was wondering if i could get some feedback on the pros and cons from buying a cnc router from china. i will give a break down of the costs for doing it my self.

frame cost

£3500 ($4,764) this includes the steel box sections with fabrication and machined for the top rails or £2400 ($3267) if i weld it my self

total size is 3000mm x 1600mm

aluminium plates

£1500 ($2042) this includes machining

waiting for price on the tbi ballscrews and hiwin rails but im guessing around £2000 ($2722)

motors are the 10Nm closed loop stepper motors on all axis £600 ($816)

rotating ballnuts on both x axis these are roughly around £900 ($1225)

2.2kw water cooled spindle £295 ($401)

already at £8,795 ($11,973) then you have all the additional proximity switches, cables, software ect...

these chinese ones on aliexpress how do they counter act the whip on the long ballscrews hence why on the diy route i have the rotating ballnuts?

the biggest cost is obviously the frame so i am in the process of looking for a used one and just replace all the electronics for better ones but when looking on aliexpress they have some nice machines but the price is weird because one looks decent and is the same size (3000mm x 1500mm) using tbi ballscrews but for only £2873 ($3911)

https://www.aliexpress.com/item/1005...7b6ae522c555-1

what would you guys do and would you trust buying from china?

thank you