Is there any online services/tools where I can do the above DIY?

If they won't clean it up, talk to the City and see if they have any tools that may help.

A quick search led to https://nelsontreehouse.com/. 

Biggerpockets sells a Lease Agreement Package under "TOOLS" at the top of your screen. $100 for a lease and several other documents, written by investors and attorney approved for your state.

Ya'll if you are trying to do a deal where you need a lender for an earnest money deposit, you're a tool who's got no business putting somebody's property under contract.

They'll save you time as they do the work of searching for the best lender for your situation.

Would recommend you further search the forums for pros and cons of Section 8 rentals.

There are some great opportunities in the Columbus, Oh market if you're still searching. 

In my market of Nashville, zoning changes have massive impacts on value and also immediate impacts too.Best of luck in your search and I hope you find exactly what you're looking for. 

They provide all the tools you need, with weekly calls, one on ones, a private FB group with open communication 24/7, team connections, and accountability partners.