Owning both an HP (L25500)/Graphtec FC8000 combo as well as a Roland (SP300V), I would disagree.
The HP is a pain in the *** to load media with. The instant curing on it is great, but have fun servicing the machine when warranty is expired, their "service kits" (OLAP sensor/etc) that go out every year and a half or so are exceptionally fun to replace. Believe I was quoted around $3000 to come and fix it for me, ordered the kit online for like $250 and did it myself, but wouldn't ever recommend it to a novice. Also, I got the lovely Onyx Postershop 10 with this setup and it only seems to print 25 mm crop marks, but yet my graphtec fc8000 only supports up to 20mm, which gives everything a nice great skew and border that isn't wanted, when I started doing the math, I eventually was like "why is everything like at least an eighth to a quarter of an inch off, wait a second, that's right around 5 millimeters". So instead I get to be blessed with adding crop marks manually in my artwork and jumping through a few hoops with Corel, Postershop, and my Graphtec driver, or I could pay an awesome $600+ (think that was what they quoted me) to upgrade Postershop and fix this "feature".
My Roland, haven't had any issue with it in the past 7 years other than the pump going out while it was still under warranty (I guess all sp300v's had bad pumps for the first few years). Easy to load media, although the curing time does kinda suck, especially since my floor isn't always the cleanest and wet solvent inks can pick up dirt, or if media folds on top of itself and it's wet, can damage the print. I've never had an issue with Versaworks aside from a few corrupt caches that needed to be deleted (I started clearing it about once a year). That being said, I still prefer to print and cut with my roland much more so than to mess with my HP/Graphtec setup.
If you're still covered by warranty, you should annoy the crap out of them til they get someone knowledgeable out there. I wouldn't try a local office, hit up corp and get them on the case. Roland's forums are generally filled with good roland techs, when I was wanting to do some thick acrylic cutting with my EGX engraver, I called up one of the techs that was on frequently posting on the forum and poked his brain. Their Blade holder excuse sounds completely bogus to me as well. Generally without reg marks, I get up to 1/16" of a possible skew, so I add a bleed, and I never print+cut anything past a 3 lineal feet to keep that as low as possible and add about 10 mins drying time before it cuts, everything else reg marks generally gets it fairly spot on. I don't know what the bn-20's warranty's like, but Roland came out within a week to my remote location (120 miles from an airport/city of size) when I had to have my pump replaced, and the dude seemed to be able to diagnose it very well beforehand and gave me a lot of helpful maintenance tips.
I do agree with you on the 20" being an awkward size and sourcing material for it will probably be very hard especially in a foreign country. Roland's trying to find new markets and make things more entry level without going the way of CriCut, the problem is the ambiguity it creates in the marketplace. Even my 30" printer was kind of hard to find proper printable media for when I first started using it, although I find most vendors now offer 30" printable media no problem. 54" was the norm back then, and sometimes I still kind of kick myself of going with the 30" instead of the 54", but it got us started anyway.
Anyway: TLDR, BN-20 is a new machine, may be hard to source materials for because of that. Set a budget first, then review your options next, if you're going into signage, size is always king and you WILL kick yourself for going too small out the gate. I don't agree that a print+cut separated solution is better than a roland print&cut, they both have their pros and cons.
