Not by any means, just takes more experience and creative lead gen to structure favorable transactions with large margins.

Where the best location too find standard & detailed renters contract online Also advice on protective verbiage I should look for within contracts based on past experiences you’ve had. i.eVerbiage concerning damages , deposit , breaking lease , Landscape maintance meeting HOA.

Spend your time and not your money when you first start, try not to buy leads. 

Ask them if they have the county locator map online, so you can see where "01" is, for example.

I purchased a lead test kit from Lowes to test for lead-based paint on the exterior of a property. 

Avail used to Rentalutions.com but it's an online management system that allows me to draft up leases, collect rent payments, post listings and communicate with the tenants.

You shouldn't accept separate payments, especially if it is an online service where people can all sign in and pay individually.

I agree with @Matt Shields that most real estate professionals value a referral or online review like gold. 

What books, seminars, online coaching, etc. did you find particularly helpful while beginning in the business? 

The risk in wholesaling is loss of earnest money, spending on marketing that leads to no deals, getting a bad reputation if you put bad deals under contract and have to weasel out of them with unethical escape clauses etc....