In addition to the possibility that these get added as liens, HOAs can make your life miserable as a landlord if the board is overzealous.

Additionally @Larry Fried hit the nail on the head, $250k is at the higher end of the market.

That, in addition to NJ sports betting and you may be on to something in south NJ.

I'm going to be a bit of a contrarian to the above posters, but let me first qualify my post by stating that your market will determine what you should do.We frequently install en-suite laundry in our units - in fact, we have removed common coin-op laundry in most buildings of 6-units or less in favour of en-suite laundry - for the following reasons:electricity and, in most cases, hot water costs are transferred to the tenant;where water is sub-metered, water costs are transferred to the tenant;high-efficency residential laundry machines are about half the capital costs of commercial coin-operated machines;we can command $30 - $50/month in additional rent with en-suite laundry;by installing our own machines, we know they are installed property, with catch/drain pans and {going forward} leak detect shutoffs; andwith en-suite laundry vandalism of laundry machines has been non-existant ... and if a machine is damaged, we know who is responsible.We have a good rapport with a couple of local appliance suppliers and get called whenever they have "dinged and scratched" units to unload ... a small, cosmetic dent in the side of a washer - which will never be seen when it is installed in a laundry closet - can be worth a 40 - 50% discount.  

Additionally, have you acquired good returns in this market. 

If their credit is acceptable to you then rent but add extra charges up front for the additional dogs.  

For instance, the tenant could handwrite some additional terms on their copy of the lease, and then claim that the modified copy is the true original. 

The Tenants agree not to permit any deterioration or destruction to occur while they are occupying the property. 19.ALTERATIONS:Tenant shall make no alterations, decorations, additions, or improvements in or to the premises without Landlords’ prior written consent, and then only by contractors or mechanics, or other approved by Landlord.

Investigating the potential of an additional onto a house for the purposes of going from 2 br 1 ba each duplex, to 3 br, 2 bath each duplex. 

Also, you need to know your specific criteria in addition to number of units.