Washer/Dryer Combo for a 1 Bed rental?

[Chris Roche]

I need to install a W and D in a 1 bed rental just south of Boston, in Weymouth.  There isn't a great space for it, so it has to be on the smaller size.  Does anyone have any recommendations?  Has anyone used ventless?  My current tenants are moving out so this is a great opportunity to do the work.  The biggest complaint I received last time I showed it was it did not have a W and D. 

I am debating if it is going to be worth adding one or not.  It would require a fair amount work with bringing water over, adding the drain and converting the closet.  

Thank you!