Flipping always seemed more risky and STR is riskier as well though it can be more profitable it can lead to serious losses. 

If not, I’d bet there was no partnership return.Assuming a 50/50 split, you should take half of all income, expenses and profit and report that on your return.

Each step my cash took along the path of my plan was established based on how (strategy used), where (market invested in), and when (cash needed to move onto the next deal (the plan).Each step required a specific amount of added cash exiting the deal as required by the next step, so I did deals that may have a cash profit that someone else wouldn't have done because they were looking at a disconnected result. 

Like flipping, much of your profit will be made at the time of purchase. 

Once you sell, you just walk away with what profit the market gives you at that time.

Look for Value-Add OpportunitiesFocus on properties you can improve to increase rent or reduce expenses—this can make marginal deals much more profitable.3.

The profit to effort ratio seems good enough.

We are a non-profit group and have a lot of investors from all over. 

or put all my properties in one account and then my subaccounts are for taxes, reserves, profit?

Wishing you the best of luck for a quick and profitable sale!