And I get the latest posts NOT related to my search terms. 

., former employer 401k) to a solo 401k are not reported on Form 5498, but rather on Form 5500-EZ, but only if the air market value of the solo 401k exceeds $250K as of the end of the plan year (generally 12/31);When funds are rolled over or transferred from an IRA or 401k to a self-directed IRA, the amount deposited into the self-directed IRA is reported on Form 5498 by the receiving self-directed IRA custodian by May of the year following the rollover/transfer.Rollovers (provided the 60 day rollover window is satisfied) from an IRA to a Solo 401k or self-directed IRA are reported on lines 15a and 15b of Form 1040;Pre-tax IRA contributions on reported on line 32 of Form 1040;Pre-tax solo 401k contributions are reported on line 28 of Form 1040;Roth solo 401k funds are subject to RMDs;A Roth 401k may be transferred to a Roth IRA (Note that from a planning perspective, it may be advantageous to transfer Roth Solo 401k funds to a Roth IRA before turning age 70 ½ in order to escape the Roth RMD requirement applicable to Roth 401k contributions including Roth Solo 401k contributions and earnings.)

Does anyone have any good books, articles, websites, podcasts to recommend to me that relate to systemizing a real estate business?

Sometimes a bank has extra rules, we call these "overlays", but you should be able to find financing relatively easy without having to season those funds. 

(I’m in bay area, age 33 if it matters.).

Not RE related but it makes you think different in that you’re fully responsible for your success (or failures).

My relatives " partners" are all in on the buy and hold thought process.

I could basically do everything related to management for them, including optimizing the listing to increase earning potential, organize the cleaning, and everything in between!

Either the relative is lending you enough to buy the property, in which case you don't need a bank at all; or the relative is lending you money for a down payment. 

Age and condition of the property, quality of tenants, and frequency of turnover all influence this cost.