Some folks are happy with 5-8% profit margin and others don't look at much under 20%.It is all going to be up to you where you are most comfortable. 

Even though the nightly rate is high, the RE has such high value that the margins are fairly tight.  

Tradeoff is you will have thinner margin for error, maintenance, softening market, etc.

That's significant and really impacts margins.

Alternately, if you’re going to do this at volume, and you’ll have to since margins here are thin, I would attend some of the lender conferences.

Those are great gross margins, better than anything that I have found in LTRs.

With margin trading of 20-25% of initial investment, when stocks market collapses with dollar cost averaging as a strategy  , leverage of the initial investment in stocks, the AAR can be more.comparable to most syndication (compared to 20% down payment in real estate).I have been following BP forums for the last 4-5 months and have spent almost 4-500 hours.

Mortgage surveys have a margin of error of up to a foot if I recall.

It’s not a big enough margin for me.

How about the simple obvious that the inputs to deliver the service/product have a base-line and market prices have, OBVIOUSLY, been at about as lean of operating profit margins as can be.