Well, it's about time you signed in and said "Hello"!
Welcome to the forum, Svartrose!
I'm reading your post, and it's very obvious that English is not your first, or second, language!

So, let's break it down into smaller pieces, and see if we can answer/comment/correct your postings, okay?
Svartrose wrote:We like to do things right for a low price.
Well, you've come to the right place!
Svartrose wrote:We haven't got any speakers yet. I've been reading this website and forum for a long time. And I bought all the plans and have red the ones that interest me. DR200/250, Tubas/Titans, Simplexx Wedge, SLA pro, OmniTop, and Wedgehorn's.
That is a TALL list of designs. Tell us what you want to do, and how many you want to cover, and we can go from there.
Svartrose wrote:We like to start with speakers that can be used for all kinds of purposes, without EQ, to minimize gear.
This is where the "trouble" is. No speaker design on Earth can run in every venue without EQ. For sound reinforcement, EQ is mandatory, not optional. You claim that you have been reading this forum for a "long time", yet you still have not learned basic set-up and tuning for the room/venue, which is discussed on here quite frequently.
Svartrose wrote:Simplexx Wedge 12 will be it.

After that Dr200's and Titan39's
Tuba 24's to support the Wedge's (as Main PA, DJ monitor or drum fill) if needed.
Again, you are not understanding what is taught on this forum: pick a single design for your needs, then add to the cabinet count until you get the needed SPL. You can not mix designs covering the same frequency range. DR200 or DR250 for mains are perfect. T39 for subs will fulfill over 90% of any gigs you will be doing, including EDM. T24s on stage, a big NO-NO!

Doing so would only serve to potentially ruin the FOH sound, where it matters. The people that are at the venue to listen, and spend their money, are all that matters.
You are at an advantage right now. You are starting from nothing. I would suggest you build some T39s first. They will build your woodworking confidence, and you can build a pair fairly quickly and use them with other brand gear. Source the parts for them before you do anything else, being in Europe makes it a little difficult to source materials and parts.
I also suggest you read a lot more on this forum. Ask questions about anything you don't fully understand. Try contacting forum user "AntonZ". He has not signed in since 23 November, 2015. He has a pair of Wedgehorn 8 and possibly a few other designs. He could also be a great source of information for finding parts and materials.
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice