And along with offer letter he sent me "Buyer's Exclusive Agency Contract" and in that it says that:Commission: In consideration for the services to be performed by Broker, Buyer agrees to pay Broker a commission of $1,000 or $2.5% of the total purchase price; however, the total commission paid to Broker shall not be less than $1,000.

This was also part of a full gut remodel of the first floor too, so cost was not exclusive to adding second floor.  

I only use a laptop or a desk top You can get to the Pro forum here https://www.biggerpockets.com/forums/443-biggerpockets-exclusive-pro-area

Account Closed - we buy property insurance and liability separately, they are not mutually exclusive.

Any costs incurred exclusively for your rental half (painting, repairs, etc.) are 100% deductible as rental expense, while those same expenses for your residence unit are non-deductible personal expenses. 

As a realtor who works almost exclusively with investors, this is absolutely a discrepancy that I am constantly seeking to take advantage of to find properties for my investors.

Well, if I were dealing outside my area, I'd spend some time selecting a good Realtor, one I could work with well and who could deliver, then work exclusively under a buyer's agent agreement.

Don't get excited about anything until you actually have the exclusive opportunity to get it.

Check for any exclusions or limitations on your coverage for wind and hail damage.

This is a liability exclusion.