God no - one is more than enough! Although if you added your 4 together they would probably weigh less than half of Finn lol.
The missus has asked for a rowing machine for her birthday so I have ordered one from Tesco - what is the betting that I use it more than she does? Will have to move the drum kit over to make room for it (she has used them precisely twice in over 12 months - time to get rid - anybody interested?)