The master would pay for the business items like - car, office, paper, etc.

I would also look at the property and how it is built.

This has helped me in the past when a unit has been damaged and/or small items are misplaced like silverware, pots/pans, etc.

Access roads and if multiple are needed for each unit.City regulations and zoning.Impervious cover requirements or percentage across the whole lot.Drainage per units built. 

The built-in accounting software is also lovely.

Quote from @Kenny Dahill: @Gisell Garcia@Miguel Angel, anyways I've built our own rent collection software, I'm still realistic and understand why landlords choose Venmo/Zelle. 

Built-in accounting software, keeps track of everything better and helps for tax returns at the end of the year3. multiple payment options are usually available for residents4. maintenance requests all in one area, easier to keep track of and keep residents informed of the status5.

Therefore, I wonder if an earnest money deposit of $50k is normal for a newly built single family house? 

There are a few items I have no idea about, I'm hoping someone here has some experience in the field and can provide a ball park means of estimate 3 costs:1.

I mean i am paying 60k per lot on a 90 lot project I have built in the last few years.