Lotsa ppl use yo-yos with no problem. I must admit that my first grow i had yo-yos and they were a complete pain in the ass, and my hood wasnt even that heavy..
I've got a 35 lb hood now, and i use rope ratchets. I didn't buy mines online because hydroshops always mark up regular items you can find at department stores just by adding the hydroponic label to it.
what do i mean.. the one im using now came 2 in a pack from home depot.(it real use is to tie shit on top of your truck). Now i bought one from greentrees like a month ago, and they labeled it Light Reflector ratchet. They charged me $19. $26 including shipping. This shit came to my house and only had one hook. I called them and they said on the website it never said it would come with two. Which i will admit is actually true, but why in the hell would you advertise it as a reflector ratchet if it only has one hook? anyway, when i went to home depot i found the exact same one as i bought for $11. 8 bucks cheaper. And the one i ended up getting was almost $3 cheaper than that and came with 2 ratchets.. blah