While I'm fine with the government collecting taxes, they should collect as little as possible to offer the protections granted under the Constitution.

*DOES NOT CONSTITUTE LEGAL ADVICE, CONSULT WITH AN ATTORNEY OR CPA REGARDING LEGAL AND TAX MATTERS!

Record the conversation, check your state laws but generally 3 or more people do not constitute a private communication.  

With this general scenario, what would constitute a fair split in rental income/profit from the sale of the property?

I'm not a lawyer nor am I familiar with RE in Maryland, but in general wholesaling is at the very least a legal gray area, and the LAST place any wholesaler wants to be is in court, standing tall before a judge, explaining WTF she or he is doing and offering their (possibly hilarious) laymen's legal theory for why their wholesaling activity does "not" constitute practicing real estate without a license. 

You should talk to other investors in your area and find out what constitutes a good deal to them and why.  

Taking property without notice is a constitutional defect that makes the tax sale void.

What constitutes a considerable amount?

Also, the market is in constant flux, so what constitutes an opportunity is always changing.

Lease AddendumAdditional Lease Provision for Residents with PetsThis signed addendum shall constitute written permission from the Landlord for the undersigned to have a pet at the location below.