I have searched the previously posted capital gain post and could not find a straight answer.I'm inquiring upon the 2 to 5 year (long-term capital gains) window that you have to be a primary homeowner to exclude or discount capital gain tax.- I understand that the capital gain tax is applied to the profit that you make from selling the house.- I understand that you have to live in the property for 2 out of a five year period.* Does this mean I would have to hold the property for at least five years?

If I call and inquire about the property, should I trust the seller's contractor if they know one, or try to find my own.

I think you might inquire about just down zoning to RM-12 just to be consistent with the present duplex use.

Whenever I try to inquire about an ad on craigslist, I always send a few questions about the item, and leave with my name and cell number so the seller can call me back if they wish.

There are exceptions so you can inquire with your plan administrator - this is the only way to get the accurate answer. 

I'm primarily looking for either a SFH or vacant land, but I did inquire about buying a US Post Office.4. 

I want to get a feel of how the park has changed since I first inquired about it 6 or so months ago.  

I inquired about the property but as soon as he stated he was "wholesaling" the property I said "not interested".

You are calling to inquire about the status of their house, learn more about the listing, and then offer to come over and preview it for your clients.  

@Nick CannonHi Nick-I too recently inquired to my lender about the % required for a 4-unit that I found and her response was if I could put down 25% it would be better.