First time speaker build

I am looking to make my first set of diy speakers. 

General info:

-Budget: 1000-1500 euro(without amp)

-Use: mostly home speakers but i want them to be loud enough for parties around 50-80 people, which will be playing mostly techno/edm

Okay, so I know its my first set of speakers but im working with a guy whos been building speakers for over 40 years so the building part wont be a problem. I only need speaker and cabinet suggestions for this build.

Id like to make two towers if it can fit in my budget, both would have a sub and some other mid-high range drivers

If anyone has a design that would fit that Id really appreciate it, and also amy driver recommendations would be great, im hoping to get higher efficiency drivers as well

Also any other help or advice for speaker building is greatly appreciated

Thanks jn advance!