Its a documentary about my hometown that will quickly dispel that notion.  

so if you live in the house 2 out of the last 5 years.. and you profit $250 (single) there is no capital gain when you sell... are there any other tax that you have to pay when you sell besides documentary transfer tax ?

Yes, explain how a documentary can exist that isn't based on pre-conceived notions of the film-maker.

So add up all the potential expenses (title insurance, Documentary stamp etc). 

If they aren't comfortable paying directly to the landlord, for whatever reason, then maybe make it rent vouchers, like the old style ration vouchers you see on history documentaries :)

I was watching a documentary about longevity (Live to 100: Secrets of the Blue Zones; Netflix; pretty good and thought-provoking) where they interviewed a local politician in Singapore.

You should also discuss the state intervension into housing and Costa Hawkins AB 1506 and this new left leaning KCET City Rising documentary!

documentary stamps are typically paid by the seller, 0.7% of sales price, abou $300.  

That has been my impression as well.For some perspective on the history of ENY, check out the incredible documentary "The 75": https://www.youtube.com/watch?

I'm not sure if it's true, but after watching a documentary on CNBC about Walmart, it seems plausible.