We have 3 properties rented and are currently finsihing up a fourth to either sell or refinance and rent so i also neeed to see how i can leverage my other properties for collateral on this multifamily if that's possible.  

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A fourth bedroom/home office was built in the basement along a powder room, a pool table area with pool table and a den.

You allocate that based on square footage, so if all three units are the same size each gets one third of the cost basis, but if the main house is the size of the other two units combined then it'd be half to the main house and a quarter to each smaller unit.

Fourth, Assemble your real-time re agent, lawyer, banker, contractors, etc.

Teri,They do it four times a year because we have 32 buildings and it is more convenient for HOA to break it up in quarters.  

Trying to do that would probably create instant problems and liability.If you have them sign an agreement stating that the basement is not to, and will not be used for sleeping quarters, it is possible that you wouldn't be held liable for them misusing your property.

The fourth option is to let him stay a year or so and the fifth option would be to just let the guy stay there forever.The options are in order of the best to the worst for this buyer.

Every office is different as far as whether they charge desk fees, whether you're required to join the National Association of Realtors® (NAR - about $500/year), who pays for MLS ($87/quarter with NAR discount), etc. 

On the positive note it did rent over the Fourth but I am still kicking myself because on AirBNB I didn't have the settings right and they got it for only 2 nights at only 200 a night.