Best thing to do is discuss this with an attorney and have them draft all your operating agreements spelling out the roles, capital contributions etc. 

Interesting proposition1) Keep 401K loan (don't know rate) and get a nice predictable tax-sheltered growth in your fund while you can keep contributing to the limit OR2) Borrow money to pay back the 401(k) and (if lower rate) increase your current and mostly tax-sheltered income.Think I'd do 2).

Also if you can negotiate seller contribution of 3-4% you can take a portion of that SC and buy out the monthly PMI. 

I contributed the max ($6,000) to my SD Roth IRA in May, knowing my (combined with my wife’s) AGI for 2020 would be under the $196K threshold.

In the past most of the classes and training and Broker ‘face time’ has been during a typical 9-5 workday, however, in today’s world most of that is available virtually which make it easier, however, there is still quite a bit of oversight needed by brokers and time and money invested in new agents which could contribute to the ‘full-time only’ agent policy.

I also second the Ozone notion.

The net profit is the difference between the assessed values at purchase and sale, taking into account any miscellaneous contributions over the course of ownership.Then, you'll have to pay the US capital gains tax, against which you can credit the tax paid in Mexico.

You selectively mention some inflammatory flash-points, like your wife having insecurities or being envious of time you spend taking care of your ill mother - while failing to emphasize any of your own faults or contributions to the relationship.

Probably so much that you'll be overwhelmed , but please remember that there's: Acquisitions (buying of Existing Self Storage Facilities); Development & Conversions (building a facility starting with dirt or converting an industrial warehouse or Big-Box Retail store into Self Storage);  Raising Capital; investing in a Syndication, & so forth.And there are plenty of folks here on Biggerpockets who have started forum topics, added posts, and greatly contributed by sharing their knowledge & experience. 

I'd say go up to developers and say I'm willing to do your s*** work so I can learn (if desperate you can say for free).Most developers can use the help, you need to convince them you'll contribute, won't screw up stuff and have enough knowledge not to ask for help every 5 minutes.