I would never die for my beliefs because I might be wrong. (Bertrand Russell)
Max IW0GXY is a great friend but he is also a problem (to me) at the same time; it is solely his fault if I reach the point to dig the internet to find a way to build a home-brew DMR repeater.
We are evaluating several ways ranging from a ready-made Hytera repeater for 1800 Euro to a cheap experimental MMDVR board plus two Motorola GM300 or two Kenwood TK-805.
Honestly there is absolutely nothing in between unless you want to consider the Motorola DR3000 as a valid solution which costs more than the Hytera compare to a brand new Motorola or like an Hytera compare to a used device on eBay with absolutely zero warranty, so Hytera is more convenient than a Motorola and MMDVM is more convenient in absolute.
There is another offer, a chinese Tytera, KYD, MYT, BelFone, you-name-it products which are not available on the B2C market but only on Alibaba and again no warranty on any aspect and I mean: compatibility, quality, reliability, etc.