Provide them proof of your ability to find, fix, flip (or whatever strategy you plan to use), and then start with small amounts of their money.

From there we identify properties that could have some potential and if you are interesting in diving deeper, 1) we do a thorough video walkthrough to give you a realistic look of the property, 2) we give a ballpark estimate of rehab costs (we do 40 a year with our GCs o we will get pretty close), 3) we talk through market rent with our property management team, ARV, and potential highest and best use.Ideally you find great investor agents who know their market really well and have a network of resources to provide you with enough confidence to take reasonable action. 

There's no reason to provide details, though I do let people know if anyone asks that we do not accept bulk up-front rent payments or anything like that because I absolutely do not want a prospective tenant to think that someone else swooped in with a bunch of cash last minute.

A buyer agreement is the legal document that provides the agent with the assurance that he/she will get paid if they work with you to complete a real estate transaction. 

I wonder if your local MLS provider has a list of MLS_only brokers in their system?

If it is someone you know you can give them a straight return as if its a loan - can provide a lower interest rate to provide upside - it really depends on the lender and what are they concerned with and what is their risk profile. 

If the electronic lock fails, you provide the tenant with the code so they can access the key.

Same to me on Zillow, I think it’s because Zillow makes money providing or finding loans.

I'm happy to go walk the property and take photos and provide a simple report of the information you want to help you make a decision. 

An LLC is potentially one minor factor that might contribute to the evidence that you are running your rental activity as a trade or business, but it's definitely not required that you have an LLC to qualify.