However, he insists that I wire the money, he will not take any other form of payment.

I'm dealing with one now where they won't change the comps to reflect 3 houses that closed on the same block between the time the appraiser visited the house and the time they wrote the report, insisting that they can't use those since they closed after they visited the house (but before the wrote the report!).

If your phone is not ringing then your marketing is probably not working.I recently read a book about small apartments and it insisted that you do not need single family home experience first.  

However, we'd want it to fit within our boutique brand, so we'd be picky about style and furnishings (in fact we may insist that we furnish it).

If you insist on making offers on the MLS, I would say go to a local REIA and meet with investor-friendly realtors.

I let him know that it didn't have to be sent certified because I gave it to him in person, but he insisted he was correct.I am curious what my options are to educate them that they do indeed have to pay the increase and that me presenting the letter in person was appropriate?

But if one had existed, they would have insisted.  

I had to email back and insist on some detail because of change orders.

Who failed, the agent for accepting a listing that was to high or the seller for insisting to list it to high.There is only one reason a property does not sell----- Price, Price, Price!

If they insist on an address find a similar one that is zoned the same, in the same area.