If you buy a bike and any bike, by the very nature of the bike manufactor it will have issues, flaws. KTM what a S*@t as an enduro but its the best to ride. Ducati aaaaaaaaaa . Buy a race horse and win for a day, thats what i think if you look at it in realialty.
Gas Gas is great to ride but is high maintenance.
Beta for chris sake just silicone the fly wheel case up once a month and i never had an issue in 7 years.
Trials bike on the whole require little work compared to other motor sports. An Enduro race would set you back near on