I don't have a preference for age in terms working with other folks but young can be good from an energy, optimism and having enough time to put in the extra hours when needed (usually a younger person is not going to have a spouse, 2-3 kids and a bunch of other responsibilities).

In December, my wife and I bought an old 1984 3/2 split level home with a walkout basement in a great area of Raleigh NC and spent the next 5 months renovating it, spending a little over $40k and pouring every ounce of energy and time we had into it.

I'm working towards Energy Star in my new 4 unit build because it's fairly easy to get slightly above code and cheap to have the raters come and certify you with the Energy Star label which would add value for the tenants especially for people with alergies or aesthma. 

So even if you can make a little more, it will cost you more in time and energy.

Similar green energy investments could be considered if you can make the numbers work (credits on some types of low income housing can be north of 50%).Depending on how long these properties have been held, they could consider implementing cost segregation studies via a change in accounting method to accelerate some depreciation.The operating proceeds could be re-deployed into new properties where cost segregation is an option to accelerate depreciation to offset proceeds.If the properties are low basis and we are not maximizing the 199A deduction, maybe considering an S-Corp structure for management to be able to participate in retirement plans and also generate wages to use as a 199A base. 

Has rent control worked anywhere on the planet or fails every time in the short & long-term.Why not have price control on college tuition, food, interest rates, new vehicle prices and energy ?

For me, I have more energy and am happier when I work out and eat a somewhat healthy diet (and it definitely recuces stress).

Making more income requires a significant amount of time, stress, and energy which would come at the expense of my family.I've also gotten to the point where it's harder to delay gratification--it's not a skill my wife is great at (so delaying gratification frequently means I go without, and she doesn't) and spending $2000 to go see nephews and nieces is much more important than having an extra 5 shares of google or MSFT. 

Then you have the energy efficiency of the home, its size etc.

I don't think that will be that fast, because we need to solve the energy problem first.