I appreciate this would be a prohibitive transaction prior to 59 1/2 yrs, but wasn't sure of the rules afterwards?

If lack of access to these resources is prohibitive, then I think your plan of collecting the fee later is best.

[Repealed by amendment, 2014 c 188 s 2]Subd. 5.Waiver prohibited.

No unit or Townhouse Building there on shall be occupied and used except for single family residential purposes by the Owners, their tenants and social guests, and no trade or business shall be conducted therein, which impacts upon or involves the use of, the common areas"I don't see where it explicitly prohibits STRs, but don't want to get on the wrong foot with the HOA.

@Lavada Lindsey This is an "ask your broker" (or your agent's broker) situation.Here in MA, our MLS rules prohibit an agent from contacting a person who is represented by another agent. 

If you are covered by an employer sponsored retirement plan (i.e. the Solo 401(k)) your income level may prohibit deductions for IRA contributions.Here is IRS info on the topic:https://www.irs.gov/retirement-plans/plan-particip...

.• In Planned Development (PD) districts that are subject to R-1 standards and uses OR where ADUs are not expressly prohibited.• In a low-density cluster development if it conforms to development standards of the R-1 zoning district, and the development and use standards of the low-density cluster permit.ADUs are allowed:• In R-1, R-2, and R-M zoning districts on lots that have one single-family residence.â�¢ On lots with a single-family residence In Planned Development (PD) districts that are subject to R-1 standards and uses OR the ADU conforms to the development and use standards of the PD district.• On any lot with an existing single-family dwelling unit, where regardless of zoning, the lot has any of the following General Plan Land Use/Transportation designations:- Residential Neighborhood- Mixed-Use Neighborhood- Urban Village or Urban Residential- Transit Residential or Rural Residential- Downtown- Mixed-Use Commercial• On two-family (duplex) lots and on multifamily properties• In a low-density cluster development if it conforms to development standards of the R-1 zoning district, and the development and use standards of the low-density cluster permit.Minimum Lot Size3,000 square feetNo minimum lot sizeMinimum Setbacks from Rear and Side Property Lines0 feet for 1-story conversions and new construction.5 feet for second-story ADUs constructed above a garage or accessory structure.0 feet for 1-story conversions and new construction.4 feet for second-story ADUs constructed above a garage or accessory structure4 feet minimum rear and side setbacks required for detached ADU in multifamily developments.Maximum HeightFor detached ADUs:Single story – 18 feet maximumSecond story – 24 feet maximumAttached ADUs are subject to the height limits of the main home.Single-family properties - No change in height requirements.Multifamily properties - 16 feet maximum height for detached ADUs.Rear Yard CoverageArea covered by the ADU, accessory buildings, and accessory structures, except pools, shall not exceed forty percent (40%) of the rear yard.Area covered shall not exceed forty percent (40%) of the rear yard or up to 800 square feet, whichever is greater.Detached ADU Allowed LocationsRear yard only, at least 6 feet away from primary dwelling.May be attached to a detached garage or other existing accessory structure.Must meet minimum setbacks for an accessory building in accordance with Section 20.30.500.No changes except that ADUs that exceed forty percent (40%) of the rear yard must maintain minimum 4 foot side and rear setbacks.

Another concept to be aware of is retirement plan prohibited transactions, which restrict with whom IRAs and 401(k)s can transact.

After you close you can just transfer to your created business entity unless your purchase agreement prohibits that. 

I'm sure there are some work arounds but it gets complicated and you need to make absolutely certain that you do not do anything prohibited or you will blow up the entire IRA.IRAs are taxed at trust rates.