I wasn't looking to be spoon fed, rather just asking a simple question.

Let's use the 50% rule and get to $3,750Use the 1% rule and we get to a purchase price of $375,000 each.Now the simple multiplication of $375,000 X 4 = 1.5MSoooo, head ache and paint of 30 lower end (B/C class) tenants or 4 higher end tenants ($375K in DFW are very nice houses in good neighborhoods)?

The forms are fairly simple and can be done online (scanned/mailed).

The best way to explaining this is for you to download an IRR calculator spreadsheet or build your own simple one and play around with one.For what its worth most deals I deem meeting minimal IRR standards is 13-15% but you have to dig a little deeper to uncover the real placements of cashflows and capitalization events... and then dig even deeper to verify the assumptions such as occupancy, rent increases per year, and what reversion cap rate was used.Again I don't look for IRR cause its manipulated a lot instead I look at total return on a 5 year basis.

I might be wrong but simple invoices to keep track should be sufficient. 

Reaching out to locals and finding a way to provide value (it could be as simple as offering to take out the trash or answer tenant phone calls) in exchange for some of this intel could be a good way to go.xAlso, I personally created a few deal analysis spreadsheets that you can find here that will give you a highly accurate and adjustable deal analysis.

Boxabl for $50k seems like a simple way to cut through the labyrinth that an addition seems right now. 

@Arcinio Arauz, you could offer the sister an amount in exchange for her signing a quitclaim deed -which is a simple one-page deed granting all her interest in the property to you. 

Here are 3 simple reasons Seller Financing is easier to find and negotiate than you may think.#1: There Are ALWAYS People Who Want to Defer Capital Gains TaxOne of the main motivators for many Sellers who end up doing Seller Financing is the deferral of capital gains taxes.

You can google how to write a business plan or buy a book but it can be fairly simple and evolve as you grow just like the goals will change as you move from 1 unit to 2 to 6 to 20.