Built a bog and swamp from Elby. It is definitely cheaper to get into bit a lot more work than assembling RS modules for example. The kits are good, I had a couple of component quantities not correct but this was a few out of hundreds of components. Everything was nicely organized. Laurie from Elby updates the build documents regularly and is very good at helping to troubleshoot via email (strangely good actually). Have a look at the build documents on their website to get a sense of it before you decide. Also look at the MW build thread for the bocgs.
What you save on money will be made up in time and effort in assembly. It’s not too difficult, just very time consuming, at least it was for me. I will definitely be getting more kits from Elby in the future.
I agree with everyone else, can’t go wrong with 3 dusgs.