i splashed out on a solitude at the end of my gap year - saved up enough money for a full build inc rohloff. took 10 weeks, cost between £7-800 for the frame and i ended up with what i reckon is a stunning bike which is great to ride.
its now on its 3rd version - the rohloff is now on a 29er, it was a SS for a bit, but i've now plugged fatter forks with bolt through, and a double and bash and its ready for its 3th trip to the alps.
only issue i've got with it is that because i specced it for a rohloff only its not got proper cable guides for regular gears. totally my fault. also, the dropouts weren't rear mech compatible.
fortunately the 29er frame i got also had sliding dropouts, so i swapped them round - a bit of filing on the 29er's ones means they fit fine in the solitude. other issue (which is currently the headache) is fitting a front mech (seat tube dia doesn't seem to lend itself to a front mech) and finding an aftermarket outer cable stop...
once this is done, and i've swapped the BB for one with a longer axle, it'll all be hunky dory.
so i guess the lesson i'd advise is either to make sure you get the bike built for one purpose, and stick with it (i.e. don't get a rohloff specific if you might ever run proper gears with it), or get a few optional extras fitted for future-proofing.
overall i'm super happy, may treat it to a new lick of pain in the next few months though, its getting a bit battered!