Here's my two cents on your dilemma:
Two months ago, mid January, I started researching the mining opportunities, and sometime later decided to buy 6 x 5600 XTs. The whole mining rig is $4300, around $600 per card and around $600 for the other parts. I bought all the cards from ebay.de, because I live in Bulgaria and here the prices of everything were in the sky. So, with a lot of sleepless nights, reading, watching videos and learning - now I've been mining for 2 weeks with 3 of the GPUs. On Tuesday, hopefully I will receive my remaining GPUs, so the rig will start working fully the next week. I just need to flash the BIOSes and do some overclocking.
I know that there's a huge risk in this investment nowadays, but for me it's worth the time and money. I like this process, it's fun and challenging, and I regret that I did not start earlier, say 4-5 years ago...
So, my suggestion to you is - do your own research and calculations, and make it worth to you.

Good luck, mate!