Since these 8 pieces were never officially subdivided (just subdivided by a fraudulant survey map and sold to 8 different people), When the developer are going to come sniffing around in the next few years, I'll be able to file for 'partition by sale' and force the other 2 property owners to sell, because a judge would see the development as 'highest and best use'. 

Once you get the park in escrow, you will want to do a rent survey to confirm the $475 rent is actually attainable.  

This is a hard stop as in DSCR appraiser also does a market rent survey, and at closing you need a lease and deposit check.Think this way- roof no good, no appliances, or visible code violations then DSCR is not a fit.

You will get at most lenders, credit for 75% of the projected future rent from the other unit based on an Appraiser survey, to use then as extra income to qualify for loan size you need.

I actually did something for my job that sounds incredibly cool, I'm a field biologist, my specialty is endangered species surveys.

I would suggest looking at crime rates and looking at closed listings to survey the area.

If it doesn't smell good to you..then don't invest regardless of who says what.1) Understand the Industry and related Industries (Real Estate, Mortgages, Credit, etc.)2) Learn how to evaluate a property so that you are not relying on someone else (valuations, construction costs, market conditions, etc.)3) Learn how to "vet" the sponsor/developer (Borrower/Investor) with regard to overall character, credit management, experience, resources/team, attitude, etc.4) Have your attorney draw up the Mortgage, Note, Trust Documents and related documents that will be used to secure your interest in the property5) Secure Title Insurance with a Survey on each transaction (understand how to read a title report and specifically the B2 exemptions page(s))6) Secure Property Insurance on each transaction (replacement value if possible)7) Secure either a BPO and/or actual Appraisal on each transaction (as-is as well as Subject To values and an income approach on duplexes and up)8) Do not release money on a construction project until x percentage is completed (Draw Schedule) and never release the final payment until the project is fully completed - Use a 3rd party Inspector (familiar with the Construction Industry) to determine percentage of completion / line item itemized9) At the first sign of distress by the Sponsor or the Project, be ready to act and act swiftly10) Have FUN! 

Gas will likely require yearly leak surveys and maintenance of a gas pipe protection system. 

Surveys are going to cost a bit especially on 4 separate ones.  

@Eric LeonBest Sources For Data:Broker Package DataBestPlaces.netCity-Data.comCensus.govFactfinder.census.govcensus.gov/programs-surveys/ahs.htmldata.census.govStateLocalGov.netSpotCrime.comWalkScore.comDeptofNumbers.comDataUSA.ioBea.gov (Bureau of Economic Analysis)Bls.gov (Bureau of Labor Statistics)Indeed.com (Jobs)NewGeography.comNeighborhoodScout.comCrimeReports.comFamilyWatchDog.usGeometrx.comSocialExplorer.comCostar.comColliers.comIrem.orgZillow.comGoogle Earth / Google Maps / Street View