Hope you mother can recover withouth complications.
As for the house is looking very nice, as for the questions, yes the bevel tool and modifier can create trianges in some parts as far as Iknow, you have to check if you need to address itor not on case by case.
As for makign it loopeable? not sure what you mean, but maybe has to do with the merge option on array, the merge distance and merge firs with last
