I have been working as a commercial property manager specializing in low, mid and high rise office buildings as well as single tenant and multi tenant industrial buildings/parks.NNN leasing (or NN or N) involves the tenant paying for costs such as insurance, taxes or all of the maintenance (including property management fees).

I'm looking to purchase a duplex or triplex in the next 6 months and rent out half or all units, to pay my mortgage and have a healthy cashflow coming in.

They either messed up one area or all areas. 

Do that across the board and in a few years you should be able to recapture some or all of your initial equity via a Refi while keeping the building for long term cash flow.Also I really don't want the previous owner colluding with tenants. 

Depending on your budget, you should be able to tick some or all of the following boxes: VIEWS, convenience of location (Close to restaurants and coffee), quiet, nearby trails, amenities (golf, gym, pool, etc), and of course the normally desired quality and size of home/furniture/etc.There are condos that can be rented nightly, priced under $300k.

I'd like to emerge from the Refinance with most or all of my money back, having built some equity in the property, and it should cashflow once it's mortgaged, rented, and being run by an awesome property manager.

Performing the terms of any written or oral agreement with Seller; 5.1.2.

. - Regardless of the area make sure the property is cash flowing positive when you leave and rent both or all units (obviously you have to know the #s, and learn how to accurately account for all costs involved for ownership, including future repairs etc...)- It seems you have two different ideas rolled into 1 conversation1.

You will need to buy up, and your future property will have less depreciation benefit. 1031 exchanges are tricky, and if you make any mistakes with them then part or all of the exchange will be taxable.  

This allows them to make a demand for part or all of their funds with thirty days notice.