House built within 10 years in best schools neighborhoods will be A, but the same house built in a hood won't be A despite its condition.And opposite, house built in the best school area but 60-70 years ago will be less desirable and will sell cheaper (that's the best house to flip) but if updated, Rent still be will be higher than the same house in D area.A area: drive by and you might get stopped by police :) some areas prohibited to drive by non residents, very expensive cars parking in driveways, most likely has professional landscaping, and all that snooty feeling :)B area is not so new houses, good schools, safe neighbors, low crime.

That's a prohibited transaction.

The solo 401k prohibited transaction rules are quite complex but the IRS has published the following examination manual to help understand these complex rules. http://www.irs.gov/irm/part4/irm_04-072-011.html

IRC 4975 defines a prohibited transaction as follows:A “prohibited transaction†is defined in IRC §4975(c)(1) as any direct or indirect:a.Sale or exchange, or leasing of any property between a plan and disqualified person;b.Lending of money or other extension of credit between a plan and disqualified person;c.Furnishing of goods, services, or facilities between a plan and disqualified person;d.Transfer to, or use by, or for the benefit of, a disqualified person of the income or assets of a plan;e.Act by a disqualified person who is a fiduciary, whereby he deals with the income or assets of a plan in his own interest or for his own account; orf.Receipt of any consideration for his own personal account by any disqualified person who is a fiduciary from any party dealing with the plan in connection with a transaction involving the income or assets of the plan.Unfortunately everything you would like to do with your IRA falls within the definition of a prohibited transaction.

You might check with whoever it is that regulates the water in the area where you are and find out all the rules and regulations associated with houseboats, and whether or not there's anything that prohibits private owners from renting their houseboats.

99% of banks and HUD prohibit agents from giving codes out to non licensed buyers.

This is helpful since a lot of smaller brokerages can't/won't pay for CoStar access.CoStar has much more in-depth info and search tools.CoStar is a much better product, but can be cost prohibitive.

Before buying a condominium always ensure that the governing documents of the condo association do not restrict or prohibit the rental of condos.

(and a lot of frustration, but also more lessons learned than I can imagine).....I'm currently under contract on 10,000SF building in Portland :)Price per square foot is higher than I wanted, but it's in EG zoning - which here means residential use is not prohibited. 

@Richard Recuset some states prohibit cash/back/credit to parties (even if disclosed) and some even prohibit Flat Fee or Limited Service listings - US DOJ has several lawsuits against several states for this.