Liability claims (a person injured, permanently scarred, or killed on your property) are in the hundreds of thousands, and often exceed $1M in the case of a wrongful death.

Which will be rolled into a permanent loan with that bank. 

My goal is for the income to allow us to permanently retire at 42 and 44 with a military pension.

While the Solo 401(k) does have many nice features such as higher contribution limits, if you will not take advantage of those features, then the simpler, more permanent IRA structure likely makes sense.Of course, the above is a general guideline. 

Another question to consider is how much permanent loan (mortgage) can you get based on the ARV?

Just as big box stores stayed open during Covid but small businesses were forced to close, this law will impede small business and force some businesses to close permanently.

In a perfect world, I would get a non-recourse construction loan, one-time close to permanent financing.

However, repairs or improvements must be permanently affixed and add value to the real property.Costs and Escrow AccountsThe costs of the renovations will be based on the plans and specifications for the work and on the Construction contract for all of the work requested by the borrower.

Mobile homes are treated differently than permanent homes. 

contact those utility companies and make them aware have any notations documented on your permanent file in case of future issues