DIY Speaker Kits, a good idea?

I started down this road/hobby last year, initially with a Parts Express kit and now having just finished my own design based off a Soundblab YouTube tutorial. As @pindac ​​​​@koestner point out, there are inherent learning curves and initial investments in tools, but it's not particularly difficult, especially if you get the cabinet flat packed. 

You can get ready made crossovers from Madison if that part bothers you.  I did that 20 years ago when building a pair of Dick Olsher's Basszillas.  The top was a large acrylic sheet I had made for open baffle, a Lowther DX4 midrange and Chinese ribbon tweeter.  The bottom a big bass reflex box with a 16" driver, all damped and made out of very expensive Appleply sheets I put together with a plethora of wood screws, crossovers mounted on top. I was no woodworker, so that's not necessary. Used a circular saw to cut the wood sheets and it was airtight. They sounded wonderful, but years later I moved to a smaller place and had to get rid of it, although still have the Lowthers which I had reconed by Lowther America and never used again, should anyone want them.  I probably spent around $4000 in materials, of which the Lowthers were about $2500 back than.  I've actually never heard anything better, but the main point is when you build your own speakers, you develop an attachment to them you'd never have otherwise.  You learn more about sound than you ever thought possible, so, if for no other reason, I'd say it was worth it.  I think a kit would be fine.  After all, you're not going to have to make the drivers, and maybe not the crossovers.  A high sensitivity speaker is especially easy to build and/or play around with.  It's definitely worth the trouble. I have a nice setup now after several moves. It sure cost more.  But I REALLY miss those speakers (they're in my little pic up there).

Heard good things about Mark Audio MOAP drivers.  Any opinions here?

Available at Madison Sound.  

My first high-end speakers were a pair of Bozak Concert Grands back in the late 1970s.  Hand build, hand-rubbed finish.  Beautiful looking and beautiful sounding.  Tri-amped.  

Very satisfying.  I moved on because we purchased a different home and the room was not fit for those monster-size speakers.

I've been building speakers for the last 40+ years with varying degrees of satisfaction.  Recently built a speaker that has outperformed every one of its predecessors.  No more building.  

"@kennyc Also seems fun to build.What’s your opinion?"

imo, If you are doing this from scratch - have the tools, curiosity, and motivation to build -vs- buy, it can be rewarding if you are the type of person who generally likes to tinker and build things.  If this is the case, enjoy the process and the journey.  

If you have never designed or built anything like this before, and have very high expectations on how it turns out - its worth spending up a little more [first time] buying a proven kit with the right drivers and crossovers, with cabinet plans, or explore cabinets you can purchase through the product designer if desired.