You are dealing with professional property management companies.

@Lance JohnsonYou could reverse engineer the county assessor site API (through inspecting network traffic), then iterate through all possible parcel numbers, storing the results and their data in a database.

Also, where can i get those contracts, can i just go on document template website and create it there, or should i find them as official documents from the county/contracts approved by professionals like attorneys? 

I expect that one would need lots of things moving in the same direction (network, SEC docs, platform) to raise that kind of money. 

Do you think I should talk to a professional CPA who specializes in real estate to get the best time frame on when and how to so? 

Corey Stalnaker“You’re only as strong as your network”

Get your home tested by a professional in your area. 

Agents will have inspectors they know/have worked with in the past as well if you need recommendations and have a network they can lean on if you need more specific inspections (e.g., sewer line, septic, pest, mold, etc.).  

Create a guest network that they can be used.Add some disclaimers to your lease for internet use.

This approach can balance cash flow, manageability with a smaller initial investment and ease the learning curve while allowing for gradual scaling with the help of local real estate professionals and property management companies.