You can find heaps of guilds all depends how much you are willing to spend ?
Check out some of the below links as examples


https://www.forbes.com/sites/jasonevangelho/2018/04/04/asrock-will-release-4-radeon-mining-gpus-after-all/#7c7e21fc77cb

https://www.pyramidreviews.com/cryptocorner/building-an-ethereum-mining-rig/

http://1stminingrig.com/best-windows-setup-configuration-tweaks-for-mining/

Also a mining calculator to work out roughly what each GPU would pay 

https://whattomine.com

But if I was you I would hold off a little longer Nvidia are releasing a new mining GPU soon

https://www.techadvisor.co.uk/new-product/pc-components/nvidia-cryptocurrency-mining-gpu-rumours-3673741/

https://www.rockpapershotgun.com/2018/04/27/nvidia-turing-ampere-graphics-cards-specs-release-date-price-rumours/