You should set some nominal interest rate or else the IRS will assume some "imputed interest" on the deal and the sellers will owe taxes for interest they didn't actually collect.Strongly recommend discussing this with your CPA to be sure exactly who will owe what to the state and IRS.

There are companies that can "help" (of course, for a nominal fee... lol) you at each step of the way.

This could be a nominal fee - say $250 for each quote. 

All the major points have been touched on above: interest rates, lending criteria, cycles, jobs/economy, etc.I'll expand on two other points that I feel have affected the current state of the market (in)directly:1) Expected returns - those following paper asset returns have heard of the anticipated 6% nominal return over the next couple of years based on current factors (not to mention the ever present and eventual stock market correction(s)).

I find it far more burdensome to enforce than the nominal value to me.

I have been in a few suits over the years.. primarily partnership squabbles ( you talk about emotional they are right up their with Divorces).First off you have to PAY your attorney up front.The loser does not automatically pay your legal fee's  sometimes but many times the judge just gives a nominal amount..

Most have nominal fees per meeting or annual fees of $100 or so.

The Case Shiller data shows that after adjusting for inflation (note this data is nominal, not real, so you must apply the inflation adjustment) there is no long term appreciation in home prices.

High nominal cap rate, but you need that cashflow to patch the bullet holes.

For example if you own a condo outright, sell it to the LLC for a nominal charge and then use that LLC-owned property as collateral against investment loans.