I would have the buyer sign a contract hiring you as a consultant, and have the investor sign a fee agreement stating they will pay all fees for the client, make sure to put in the agreement when the fee is expected.

They are proactive about self promoted reviews and there are thousands of contractors to choose with reviews from past clients.

I'm a Realtor and Real Estate Consultant here in Anchorage, Alaska and I am currently working with a client that is dealing with a subtenant that refuses to pay the agreed upon rent each month --to add to the problem, this subletting agreement has not been approved by the apartment community as required by the lease AND there is no written sublease agreement between the master tenant and sublessee. 

Losses are recognized in the year the loss is realized.

On the other side, recognize with a SFH or condo, when you have vacancies or tenants that don't pay, the lost rents tend to hurt a lot more (especially starting out if you have limited resources and need every penny to make mortgage payments.)

If your local title company handles the A-B, they can advise your client on what the deed will look like on his B-C transaction.

The point – for any client, I would encourage careful review of fees assessed.

The more that is paid the more of the profit you recognize.

Paul, I would hire a recognized PM company.

DON'T focus on the money.Help people and the money will happen.Sometimes it might take 6 months to find my clients the right property.My goal is to set them up for success for the long term and not make a quick buck off of them.By pushing yourself too much this potential buyer might feel you are just "trying to get them to buy something" instead of really helping them out.