Some form of this has to be legal because a very experienced and successful investor in our area pays thousands in "marketing fees" each year.Is a special form required? 

We specialize as buy and hold investors who self manage out of state investors in class A properties.

@Jean Nkondi , I think you really need to reconsider this strategy because of problems at multiple levels.If you don't have a contract, then you are just acting as a bird dog and you better have a close relationship with the potential buyer because if not (ie just posting on a website), what's to keep that buyer from bypassing you completely and just going directly to the property seller?  

Can I ask for the seller's information and some information on the properties, and then pass them along to another wholesaler for a bird dog fee?

She didn't do anything special. 

Why would you want to spend more money and time on creating a floating clip for your wesbite or blog.If you're keen to use your presentation skills and give some new technology a try I think you should trial VideoStir DIY website presenter solution: it's free, easy to use and requires no special skills or equipment.If you know similar services please let me know below. 

You might consider Niche or Specialized Housing like student housing.

Are there any special considerations that should be taken into account or standard clauses that I may need to add in the lease agreement to cover myself given that she will be conducting business from the location?

I work for a wholesaler that specializes in distressed single family homes.  

No effect on taxes at all, unless you elect special tax treatment.