I would say that the most important lesson I've learnt so far is to implement systems and processes.

Mainly, the systems implemented are fascinating (VA, automated offers, etc.)

It's definitely going to be cheaper and faster than hiring a programmer to do the work for you but I always wonder about the quality and the freshness of any data that I receive from 3rd party sources.  

Will implement this!

I would still implement the house-hacking strategy, just on a 2 to 4 unit instead.

Since you are buying with cash and you have a partner, both are solid reasons to implement asset protection.

I haven't found a fiverr zoho programmer though.Gosh, I wish someone could remember the guru who promoted a pre programmed zoho.

It is up to the individual buyer to objectively weigh ALL of the factors including mortgage costs and interest, alternate investment returns, tax consideration, amount of time needed to implement and manage the decisions and personal investment goals.

Any investor considering the use of such a plan should be sure to educate themselves thoroughly and work with professionals not only for the basic acts of implementing the plan, but more importantly with regards to the proper usage of the plan and developing an investment strategy that will meet their goals while remaining in compliance with IRS guidelines.  

Any software you use, you need to setup, implement and be diligent in using it.