This includes all furniture and accessories. 

These can be some jems that allow for upgrades to make it a duplex or a sfr with an accessory dwelling unit.

@Dominic LucarelliHere are the code violations:#1 [Front of property] 302.7 Accessory Structures - All retaining walls shall be structurally sound and in good repair - make repairs to retaining wall#2 [Front] 302.7 Accessory Structures - All porches shall be structurally sound and in good repair - make repairs to porch#3 [Front] 304.13 Window:: skylight and door frames - Every window:: skylight:: door and frame shall be kept in sound condition:: good repair and weather tight - Repair door frame#4 [Throughout] 304.13 Window:: skylight:: and door frames - Every window:: skylight:: door and frame shall be kept in sound condition:: good repair and weather tight - Repair windows#5 [Front] 304.10 Stairways:: decks:: porches and balconies - All stairways:: decks:: porches:: balconies and walkways shall be maintained structurally sound and in good repair - Repair walkway and stairs#6 [Front] 304.12 Handrails and guards - Every handrail and guard shall be firmly fastened and capable of supporting normally imposed loads and shall be maintained in good condition. - repair handrail#7 [Throughout] 302.4 Overgrown weeds or grass - All premises and exterior shall be maintain free from weeds or grass in excess of 10 inches - Cut overgrowth#8 [Throughout] 307.1 Accumulation of rubbish or garbage - Property must be clean of all rubbish or garbage - Remove all rubbish and garbage-#9 [Throughout] 305.3 Interior surfaces - Cracked or loose plaster:: decayed wood and other defective surface conditions shall be corrected. - Repair walls

Or get cheaper cabinets but then add in some of the accessories, i.e. pull out shelves, no slame hinges, etc...Some higher end MDF the average person can't tell it's not real wood.I NEVER go to boutique, specailized stores for anything as they are always higher.

Accessory Apt or Movie Room/Man Cave?

A common one is adding an accessory apt onto an appropriate single family (with all the right permits and licensed workers) or maybe just buy a sf with an apt or aim for a duplex.

That bad enough... but its totally something else for that same criminal to go to a court and sue you to change your door locks, because he feels its too much work breaking in.... you enable enough people to knowingly and deliberately commit crimes and at some point you are liable to face criminal charges as an accomplice or accessory.

The term does not include companion units, junior units, or employee housing.Companion unit means an accessory structure on a residential lot that provides independent living facilities for one or more persons, independent of the primary dwelling unit, which includes permanent provisions for living, sleeping, eating, cooking, and sanitation.Accessory structure means a structure attached to or detached from a primary structure located on the same premises that is customarily incidental and subordinate to the primary structure or use.

Long post here, but I am considering putting an offer on a property in Montgomery County, Maryland and converting the basement into an accessory dwelling unit. 

Asking the seller to vacate unit has to be taken on a case by case basis.I agree that you should also attempt to turn the illegal unit on the property into a negotiation advantage for you.I too dealt with illegal unit issue (accessory dwelling unit) when I first started hunting for multi units to buy.