I speak fluent Japanese, but as it is a flight and a drive or an 8hr bullet train ride away, it will still be a long distance investment. 

Looking to learn everything from finding and financing a deal, estimating rehab costs, SF vs multifamily, handling and training tenants, hard money lenders, how to research market comps and rents, follow community migration patterns, legal knowledge, and everything investor related.

I've seen people bring in temporary steel (for clearance reasons), jack up the entire floor 1/4" per week to level (could require 3-4 pieces of steel and multiple posts) and then correct the failed beam and put everything back.Since you've already done some modification to the support, this may not work.In any event - it sounds like it may be cheaper to address this from the top down (removing the floor) vs attempting to find a contractor in your area with the correct insurance and training to do this without long-term repercussions.

There are a number of training/coaching/mentoring organizations who specialize in multifamily and share their spreadsheet templates.

I have trained 100s of realtors and most do not understand beyond the basics. 

These are professionals with additional training and a stricter code of ethics.

Loan officers are often hired and trained to be salespeople.

And I am not talking about the delayed financing approach.from my point of view.. paid for training is fine if your not going into debt to do it.. your not using up capital that you need to actually buy real estate.. if you have plenty of dry powder then sure we all have to learn somewhere and somehow.. 

Two other things that make it possible are a supportive spouse and a brokerage that allows me to get training, support, and mentorship outside of regular work hours - that way when I DID take time off, it was for direct real estate hustling like showings, client appointments, and offers. 

All were properly trained.