There is something wrong with the math.
I am guessing that 5GH/s units are the 20 chips modules. If I convert 105 EURO's to CAD it's about $150 CAD. To get over 100GH/s I will need to spend $3000 CAD. Yet our friend YiFU sells the 4 module Avalon's for 12BTC which is $2400 CAD which I can easily get 100GH/s from.
Don´t forget the time in the math.
The costs for 16 Bitburnerxx ( with together 320 chips) were ( long times ago)
320 chips 0,086 Bitcoins each : 27,52 Bitcoins
16 BitburnersXX 105 Euros each: 1680 Euros ( it that times about 16,8 Bitcoins)
ATX PowerSupply, Raspberry Pi,.. 250 Euros ( 2,5 Bitcoins)
27,5+16,8+2,5 = 46,8 Bitcoins
Today the AVALON 4-module miner with 320 chips costs 8 Bitcoins
So today it is better to buy a miner with 320 chips for 8 Bitcoins then for 47 Bitcoins ....