My question is, who should I call in regards to making offer.

I offered $400,000 which was accepted, and my yield on the purchase price was about 12.75%.  

I am often amazed on larger deals when buyers send in cash offers with nothing more than an LOI or contract offer.

If a PMC only charges an owner a flat rate leasing fee of $500, what amount of commission can they offer on the MLS to an agent that brings them a tenant? 

I mistakenly signed a contract to sell my house with a cash buyer company.Ignorant of the process, I now have questions regarding renegotiating or request to amend contract.1) Earnest money was not offered by his minion.

For example, if someone has a low credit score but a great investment deal, I might suggest finding an Individual Private Lender who cares more about the property than the borrower's financial status.)Differences:Hard Money and Private Money Companies: These usually follow strict rules and have more money to lend because they have many investors.Individuals: They might offer more flexible loan terms since they decide the rules themselves.

Tampa is great for the nightlife and offers a lot of new places to wine/dine but the traffic can get a little crazy. 

This is extremely insightful.

Owners mistakenly ASSUME all PMCs offer the exact SAME SERVICES and PERFORM those services EXACTLY THE SAME WAY, so price is the only differentiator – so, they often select the first PMC they call or that calls them back!

I would recommend listening to the BiggerPockets podcast, reading the guides and blogs, or even checking out some of the books they offer there.