In talking with the lenders Commercial Loan Manager, the SNAFU in the process was that they used the same underwriter as an institution I was in-process with at the beginning of 2019, but pulled the plug on due to lack of progress and disagreement on the terms. 

To help make a decision and consider some of the factors affecting the markets in the setting of covid 19 you might want to check out these free resources: 2021 Marcus Millichap Multifamily Investment ForecastMilken Institute Best-Performing-Cities-2021IRR 2021 Annual Multifamily

That or maybe you need to shop financial institutions? 

House hacking is your best route to get your foot in the door and build equity and prove to financial institutions that you are capable of being a landlord.

the max financed properties fannie mae is 10, i believe My goal is for next year 25 rental properties, how can I achieve it with different finance method or financial institution? 

@Shafi NossUsually the exit strategy for institutional grade properties is selling to investors that are not looking for value-add but looking for a yield play; among others, life insurance companies purchase these types of properties.

@Samuel LiapisKeep in mind, before Covid-19 institutional lenders were going bonkers funding 90% of purchase + 100% rehab and such.As soon as the stock market took a dump and people started getting laid off these lenders shut their doors pretty quickly and are just now starting to get back into it.

Keep more of your your money fluid by getting a monthly check while still appreciating in stable institutional grade real estate, like Home Depot’s,  Amazon warehouses, Big multi-families, etc, while being completely passive.

Sellers can't count on having the same life expectancy as a mortgage lending institution, nor the patience to wait around for 30 years until the loan is paid off.

@Edward GroganIf you have custodial SDIRA - your IRA account must be held by this custodian.If you are referring to Checkbook IRA (or IRA owned LLC it is often referred to) then you can open an account for the LLC that your IRA owns at any bank or financial institution.