I know the IRS has a certain time frame (I think 90 days) to procure the property.

.) - and those time frames adjust depending on the type of loan product the buyer intends on using for exercising the option.

In the meantime your rent is still due, therefore if rent is not received in my office by (the allotted time frame per your state law), then we will file an eviction against you for non payment of rent, which will go against your credit rating for a very long time.  

Swapping out the locks is inexpensive but it buys a lot of goodwill .

and what is your time frame for the work you need done?

It is likely that I will not find a buyer in the timeframe of the purchase agreement which would result in a canceled contract.

This might lead you to believe you're getting an unbelievable return on your full principal but since your principal is getting returned each year with a high CoC this will inflate the IRR which I find a little misleading.So it's also important to look at timeframes and ultimately the multiple which will give you the true return on your original investment.RM looks to be shifting more toward their new eREIT offerings similar to FundRise.

If you hold beyond these time frames, the compounded impact is exponential.Some investors combine cost segregation with bonus depreciation and they don't pay taxes for many years, they reinvest those savings and drive their after-tax returns up.The tax code is designed to stimulate commerce and this treatment gets investors to transact (which generates income for brokers, inspectors, appraisers, agents, title companies, attorneys, contractors, engineers, regulators...the list goes on).

(This decision is a recurring one where they will need to continue to overcome challenges and setbacks)  How much money are they able to invest in the deal.How much time are they going to commit to the process (this will help define a timeframe in which to set the goal of closing the first deal).What type of risk are they willing or able to stomach?

It could be that you find, rehab, and/or manage the property to earn your extra ownership percentage, or it may be that you kick in more money at purchase or in expenses over time, or it may be that you put your credit on the line as the one signing for the debt, or anything else you negotiate.