Bought one recently with its own motor etc... in LIDL and it is less than useless to be honest. Taking up valuable space in my utility room. The suction is pretty bad although it does sound like it could pull the paint off the walls.
If you can come up with a solution for covering the bit of carpet infront of the stove while you clean it out you would be better off!
wouldn't recommend vacuuming the ashes out on a daily basis as there can be hot material buried in the ash that could create fire hazard inside the vacuum cleaner.