Many businesses just need to establish some physical office presence, without the need for much room.

Roth IRAs cannot be transferred to Solo 401k plans.A few other Solo 401k benefits: Compared to an IRA, Solo 401k contributions limits are roughly ten times higher.There is no custodial requirement for the 401k.You don't need the additional expense and administration of an LLC to have checkbook control.There is a built in-Roth component whereas IRAs are either traditional or Roth, not both.A spouse can also participate in the same Solo 401k plan.The Solo 401k has additional tax benefits over an IRA when investing into real estate using leverage.

It drives me crazy because it's serious physical damage being caused by some silly bureaucratic rule somewhere that is not in the owner's best interests.

If you're self-employed, the Solo 401k will provide many benefits over a self-directed IRA: Compared to an IRA, Solo 401k contributions limits are roughly ten times higher.There is no custodial requirement for the 401k.You don't need the additional expense and administration of an LLC to have checkbook control.There is a built in-Roth component whereas IRAs are either traditional or Roth, not both.A spouse can also participate in the same Solo 401k plan.The Solo 401k has additional tax benefits over an IRA when investing into real estate using leverage.The penalties for prohibited transactions are less severe, though it's best not to utilize this benefit :)

I think he will stay on until he physically can’t work anymore, so there would be a decently long transition period.

I have some medical conditions that will keep me from continuing that job long term as it is physically demanding. 

Find a way to improve the physical property AND the operations to increase the revenue and decrease the expenses. 

I would physically take home ~$200 more per month after all payroll deductions.Should I wait another month for my income to increase prior to applying for a loan, or go ahead and get approved this week as planned?

Invested without physically seeing the property.

Physically going to the county courthouse and researching a/any probate file is more accurate than paying for a service.