I've saved up what I think is a remarkable amount of cash for somebody my age and I have a vast amount of rehabbing real estate and mechanical knowledge. 

Sovereign debt levels are crazy high and only going higher due to unfunded liabilities caused by the aging of the baby boomers.Debt is more in demand than any time before.

Buy something and let someone else pay for it off for you, at your age you should be able to rent rooms out to peers pretty handily, plus living alone sucks.One flip will give you $2100/mo for a year if you do it right, that kind of income is pretty low for rehabbers (the ones that know what they're doing anyway). 

Just a little about myself: I'm happily married with 4 beautiful children (ages 11-22 years) and 1 darling 1 year old grandson.

I also worry about spouses or underage children as some children's rights are tolled until they reach age 18. 

In the time we could be holding on to their notes, the properties would be aging. 

For existing properties it would be an unauthorized transaction for me to transfer/sell the properties to my IRA.Also, I am a good distance from tax advantaged account disbursement age, all the property investment income would be contained within the IRA not flowing through to my pocket to be used in a more discretionary manner such as repairs, vacation, personal home maintenance, or the most likely reinvesting. 

The population demographics ( I mean age - adults/children?)

These ideas have beeen around for ages, the creativity comes in the execution.

If my goal were to retire at the new retirement age of 73, then I would probably hold and see what kind of appreciation it would get over the years.