I know buying the house won't require me to pay the agent, but when I make a double transaction and wholesale a property, should I use a realtor? 

Having been a high volume REO agent in the past I can concur there are many details involved that must be transacted properly on both sides of the transaction in order for the seller to substantiate taking what is more often than not a serious loss of capital.  

If there is one thing I've learned over the years, every real estate transaction is unique. 

It shows you have an attachment and emotional interest to the property, which is fine, but this is simply a business transaction/proposal. 

Wholesaling is sort of the opposite of a real estate agent in some regards, though not necessarily in a negative way, and it does NOT require a real estate license -- it's just finding the right deals in neighborhoods with potential (NOT war zones) and filing and recording the correct forms and legal documents to execute the real estate transactions.

Transaction entry, reports, tax planning?

I understand that when I'm doing transactions with a buyer or seller that I'm representing, that the Pennsylvania "stock" agreement of sale must be used.That said, like many investors I have a much shorter and simpler two page agreement that I have used up to this point when purchasing properties direct.  

But in Texas you can sometimes accept "gifts" (not money) of up to $50 value for each transaction.

Are there any companies that can provide a V.O.D, and transactional funds in e funds the name of the borrowers company?

Can a HUD authorized listing agent represent a buyer also in the same deal? If so this would give them more incentive to sell to me as an investor correct?