These are all associated however; have exact definitions.

I would recommend joining the Austin Apartment Association if you haven't already.  

The equity in your property has opportunity cost associated with it.  

Sure, you probably want to start going to REIA's like CCIA or Southside builders association.

You may also find it helpful to attend the local Real Estate Investors Association (REIA) that meets each month.

Then there is also the Price Escalation Addendum to Agreement of Sale (PEA) that the PA Association of Realtors uses - this is used to bump your price along until it reaches your stated maximum.

@Craig Lessler  It looks like you are an agent, why not use the Arizona Association of Realtor forms as a basis?

Tempting as that sounds not worth the many many risks associated with it.

I've never done any kind of investing before.The obvious data to record would be the purchase price, market value, sale price, and associated fees for each parcel that I acquire.

@Brian Nordman some condo projects are not FHA eligible because the homeowners associations are not approved by FHA, for one reason or another (usually condition of the properties, something within the HOA paperwork that HUD doesn't like, or certain percentages owner vs. renter occupied).