But in both cases you're "comping" just the same.Another notable difference between single family home valuation and apartment valuation is in the availability of data.

Im sure a PVA data search would show where they have picked up land (likely 2-3 different plots) and then start looking for units around them to buy and hold. 

I currently have a large 1300 sq ft+ 1 / 1 condo that has a very high HOA in general but after analyzing the data it's also high for the building.

I know there's data out there regarding property prices, and there's data out there about the short-term rental market a la AirBnB, but do you know where I can find data on year-to-year leases for rooms? 

That's a nice jump in value for only $10k in repairs.

This is because they scrape data off the MLS listing for their listing on their sites. 

Do the following, go to assessor's website of county you live in, locate GIS data organizing properties by number of units, download excel spreadsheet of addresses/owner info, import into google maps using site such as batchgeo, drive by and identify 15-30 properties you're interested in, skip trace owners to find current address, text/email/call owners, be consistent & do this every 1-2 weeks, you find a property in 1-3 months. 

Thanks for the info Ehsan.I would be using the data to do wholesale & / or fix & flip. 

They will tell you the spread they charge and the source of the data that you can easily find online.

Since that time we managed to partner up with a much more seasoned real estate vet that has provided invaluable insight, mentorship and fuel to the house-buying fire.NOTE FOR NEWBIES: this person that I consider a business partner, and more importantly a mentor, came directly from BiggerPockets.