For instance when they arrive for the showing have they spent a lot of money on a flashy car, car accessories, clothes, etc.

He chose the apartment partially based on their no pets policy. 2) They smoke pot on the porch (now legal in NV). 3) They participate in various other activities like drinking and vaping. 

In Austin, TX there is a scarcity of affordable housing so the zoning was changed to allow accessory dwelling units on city lots that meet a certain size. 

Years back, I found it more economical for me to buy a house full of mid-range furniture and accessories (we have less than $15K invested) and use it flip after flip. 

Claiming it as accessory dwelling unit seems out of the question since the lot size is only 4410 sqft.

I posted my situation in a general forum, but given that there are nuances in my decision specific to the SF market (and regulations) I thought I'd post here too: https://www.biggerpockets.com/forums/88/topics/451...The in-law cottage is an accessory unit, which I believe prevents a rent control situation, but expert thoughts welcome!

(The caveat being that you need to make sure zoning allows that type of accessory use.)

You may be thinking of ADU--Accessory Dwelling Unit.

I just did a black four-piece kitchen for just at $1,500, which included tax and all of the accessories that must be purchased with the appliance for Lowes to install it.

If you know of a fraud and benefit from it then it seems you are an accessory.