Sometimes we have opportunities to sell a house and make multiple years worth of profit in one day.How much profit is enough to justify selling now so we can reinvest as Joe described and how much is too little that we should just rent the house for 5 years on a portfolio loan?

Most at least claim to be justified by safety concerns, although (at least in California) there are a significant number of other interests at play in most of the building mandates. 

What I am a little concerned about is an agent utilizing the safe harbor mechanical rules as some kind of psuedo baseline in a case law analyisis.There is more than enough tax cases to stand on to justify rentals for section 162. 

It's my position that the opposition to the SE did not add any evidence to the record that could justify the ZBA's provision to the SE.

Is this becoming the new barrier to entry for investors or justified?

I work remotely and it's a matter of justifying your hours on W-2 vs your hours on real estate. 

Fees should be clearly stated, easy to understand, and justifiable.

how do you market a home as green in a way that will raise your selling price to justify the extra money you spent installing the green systems.

Fees should be clearly stated in writing, easy to understand, and justifiable.

Neither my partner or I bring any value to the table except for money and we have discussed partnering with someone who has the skills you want but it's tough to justify, in our minds, why giving away 33% of everything is cheaper than sporadic hourly rates.