If you don't have tons of income this could make other transactions in your life more difficult, buying a new car, credit cards, etc.

Seems it is pretty difficult to get mortgage from US banks.

If I'm right, getting a 7/1 today means that I will have difficult choices to make in 7 years.  

Keep in mind, it might be difficult to wholesale a mobile home because not many investors work with them.

Though you didn't record the note to secure the property with a mortgage, you can still make it difficult for him to operate and potentially raise more money when new investors check him out and see his history.Don't take it lying down (so to speak). hopefully more people will chime in.

It will always be difficult to get a quality drywall guy to come 'fix' a single hole in the wall.  

Cities can sometimes make doing business very difficult.

You will have difficultly attracting a good renter in a high crime area.Also busy streets can be a problem for residential houses (SFR).The other more subtle issue is over improving a house based on the neighborhood.

The 2nd can usually be over come with pricing it is just sellers don't want to admit that their house with the train tracks in the backyard isn't worth the same as the similar house 0.1 miles away that doesn't see or hear the train at all (as an example or a flaw that made a house I did in Natick a couple years ago more difficult to sell than I expected). 

Just recently flipped a house I bought off auction but what I'm finding most difficult is that nasty "F" letter word "FUNDING" :).