My personal preference for a buy and hold would be an already established area (or an area that's still gentrifying, but has already seen significant progress). 

Personally, I would not keep a rental that is not expected to cash flow. 

My wife and I plan to purchase a few properties ourselves, but with the lead generation strategies I’ll be implementing, I expect to come across more deals than we can personally handle.That’s where you come in!

From what I have researched they seem legitimate but the person I am working with is flakey, takes forever to answer questions so I thought I would see if anyone else had experience with this lender.  

It can come from a personal investor who will negotiate terms, or potentially a piece of the equity.

If someone injures themselves and sues, they will be suing the LLC and not you personally.

My goal is to wholesale some properties single and multifamily to build some capital while fixing my personal credit and building my business credit.

I'd personally recommend @Andrew Freed.

While an LLC can offer liability protection and tax benefits, it’s not essential for a single property—personal liability insurance and an umbrella policy may suffice for now.

It should be from someone who uses that person.