Does Sewer Lien goes to the owner's credit. 

You can only get one if they check your credit though. 

Yet my credit score is not strong..

Can you recommend a company that can provide credit, eviction, criminal, background check on applicants?

Sure, I can create a  a land trust and pass the interest to a LLC as beneficiary to protect my credit score and to reduce - not to eliminate - some risk.  

I am interested in the wholesale part of the real estate niche as I have bad credit and no money but I also am a law abiding citizen. 

Overdraft is basically a line of credit attached to the account. 

My tenants have to sign the lease and give me the security deposit with 3 days of passing credit and background checks.  

The most common way to reduce closing costs is to have offered $Xk more for the property, and ask the seller for $Xk in seller credits towards closing costs, or just get the seller to pay for certain line items. 

If the $1000 includes Open House signs, 3 months monthly fee, business cards, website, key access, a lockbox, training program so on and so on, then I can see why.