If I'm gonna do animations, I need a render farm so I don't have to tie my computer up for a week because it's rendering 24 frames per second. What's a render farm that will let me render without asking for any info that may come back to me? Even if I'm doing a project that's super small-time, I don't wanna get fingered as a pirate and get 'outed' for it. I'm concerned about getting hit with a DMCA takedown or getting sued.
How would anyone know where you got the items you used? Daz and Rendo have no way of knowing that you didn't buy the content even if they where checking...which they aren't.
Only thing you need to check is the license terms some only limit it to static images or animations but may not allow you to incorporate the results in say a "movie"
Just check the licensing terms or ya at worse get a ccopyright strike if on YT or a dmca notice sent to wherever ya upload it to
What Jay Versluis did (he's on YT) was grab an old Xeon workstation on ebay, max out the RAM, put a couple of 1070Ti or 2080Ti in there and he was set. All cheap used gear.
But you should know your way around Xeons, MBs, memory requirements, et al before 'pulling the trigger' on any 'great deal' you find. The results (and price) will amaze you, if you do it right.