@Nathan Patterson - sure. Using a lawyer or third party due diligence company (e.g., SDSX or Richard Monroe) is always helpful, but it's also a good idea to start becoming familiar with big button issues yourself, particularly with post-Dodd Frank loans to owner-occupants. That way you have an idea of what to look out for ahead of time. In case it's helpful here's what I've found to be useful:
1 - read as many articles (lawyer briefings and CFPB articles are a good start) as you can about seller financing/mortgage origination rules, and have a look at the actual legislature clauses being referenced (even if they aren't reader friendly). Suggestion: don't take one person's view as the sole truth and stop there, instead supplement what you read by also chatting with experienced lawyers/lenders/investors and looking at the actual legislature.
2- research High Cost Mortgages and High Price Mortgages.
3 - sign up for news alerts from HousingWire and InsideARM. Google anything you don't understand.
4 - Another BP investor showed me this helpful tool, if you google InsideARM state licensing, they have a graph briefly showing what requirements each state has. Many states only require collection agent licenses (which your servicer will have), but some may require investors to also have a license.
5 - once you know what state you want to buy in, chat with lawyers, servicers and experienced lenders active in that state and ask about licensing/registration requirements. Also ask them what compliance issues they commonly see investors running into in the state.
Note, I'm not saying you will become an expert if you do the above, and it's not meant to be an exhaustive list. But you will be more educated when looking at buying loans (especially those originated post-DF), and hopefully save yourself any big headaches in the future.
Good Luck!