My budget allows me to buy 2xUSB-fury 5GHS and ASIC AVALON 70GHS. Will it be profitable to buy this stuff and will it help to reach my goal?
Probably not. Better start out small and only buy 1USB for the start and gather some experience if it's worth it.
Just make an investement and buy some BTC's for 2000 USD?
Probably better, but remember: There are no grantees in Bitcoin. Only invest what you can afford to loose. (Your post sounded like you can't afford to loose 2000 $.)
I'll try to get some experience first and also I'll buy 1 BTC(it's cool to have 1 from 21m). Thank you for advise