it had been modular long time liao - can change lens, change flash, change strap, change screen cover, etc. and if you have the know how can change most of the thing inside also.
I'm one of the first to have the 5Dmkii. will order 3 sets as xmas gift and holiday cruise, for my childern and wife. black hole or what is non-issue. at this price it is a steal.
it is priceless to hang a 5d mkii on my neck. hence I've got it on the first day it came. yes the price has since drop, nothteless, walking down orchard road with it is cool.
the problem is that as I wait for the price to drop they pop another new model that makes me drool. Now I'm stuck in the waiting games since the release of Canon EOS-1Ds in 2002.
just move the elderly lady to an old folk home, period. This should be the solution and hopefully you will be able to cohabit with your bf happily forever with the dog.