With two rentals, you might consider QuickBooks Online Plus, which allows you to track income and expenses by class codes (ideal for separating each property’s income & expenses to assess profitability by property).

Average profit on a trailer park is between 10-15 percent .

It was one of the most interesting REI clubs I’ve attended and very telling.We make it clear to all borrowers up front that we will only lend if we are confident they will make a fair profit.

That is, how well did your deal analyzer estimates match the actual rehab costs, holding costs, ARV, and profit?

They are currently on the IRS radar due to widespread abuse:https://www.irs.gov/charities-non-profits/conservation-easem...

sell third house this time dump half the profit into SnP 500 index fund, other half builds fourth house... repeat until satisfied with stock portfolio, retire at 50option C) Aggressive model: sell house for $600k just keep carrying my primary mortgage which is $2900/month and dump the money into 2 properties and build 2 house at once that would each be worth $600k...?  

Some fear losing control, while others are unsure how to structure a fair and profitable partnership.

Relationships always build better more profitable relationships.  

I am estimating to generate $8k per month net profit, on the low end. 

Take your flip profits in CA, and buy with those profits for CF in the Midwest.