What makes mobile home park special (compared to apartment and houses).3.

Ask to compare to what was advertised at time of sale. 

A real estate market analysis is a study of current market values of homes, comparable to yours, that helps you determine the market value of your house.

Once you have determined that, then ask for a comparable market analysis of properties active or sold in last 6 months.

I have read success stories here on BP of people who have started in both SFH and MFH, so i figure either way is possible so I may as well go for what I'm interested in.Clearly, a key element of being successful in MF is financing right.

Then compare her spreadsheet vs. 

So I got out of class last night and my professor was telling me that, in order to do an income(investment) property, you will be charged with a higher interest rate compared to a property that you would finance for yourself.

(2) Does it save money when compared to buying a retail house of the same?

IMO $800 is money well spent compared to what you can save.  

The entire industry has changed significantly in the last 7-8 years and keeping up with it all is a daunting and necessary element of our business these days.