Net margins of approximately 25% over the course of all projects

And now the margins are too tight for people to do it. 

Reno loans are quite expensive, eats into your margins quite a bit, so much competition here as well...

The key is to make sure you purchase your the home at the lowest cost and know what your after repair value will be to see if you will actually be able to make a nice margin after netting all cost.

It’s a great strategy in a hot market where properties move quickly, but profit margins can shrink in slower or uncertain markets.On the other hand, buy-and-hold offers long-term wealth-building through appreciation and rental income.

If you don't fall within that category you either get caught up dealing with the BS minutia of the business or are reliant on outside PM's that eat away any margin because there is significantly more time that goes into operating Section 8 rentals and don't let the "guaranteed rent" make you think otherwise.  

With the numbers provided, such STRs operate at 50%-60% margins like software companies.

You want your price point to go up a little each time you buy to flip because the margins get higher as your price point gets higher and a lot of times the percentage rehab stays the same.

I see higher, and if you pay lower they are making up for it somewhere else (hard to run a low margin business). 

I am using margin on my brokerage account.