I have a basic spreadsheet built for clients that I'm happy to share for free.

I was basically being double hit for my mortgage, hoa, etc; I was paying them all in my Schedule C, but then lenders were again adding it to my DTI as an expense.

Just use the basic Due diligence time line in your contract and during that time line contact a local attorney and ask them to review the contract.

Manually reviewed reports often include court calls and record verification that automation cannot legally do.

Any recommendations for those basic services? 

They will try to claim that its a "civil matter" and that you should deal with it in civil court. 

My humble advice to anyone attempting to do creative finance is:Creative finance is for experienced investors who have access to capital if anything goes wrong.Learn the lawsDon't use a contract "off the internet", laws vary by state and are also regulated on a federal levelLearn the financing techniques correctlyDon’t skip parts of the processDon’t ever do a “kitchen table” closingUse the proper deedAn attorney can help you with the legal work, but the rest you are on your ownYour guru will not bail you out“Investing” in someone else’s deal by providing a small 2nd loan so the “investor” can pay for “cash to the seller” and for “closing costs” so he can do the deal is a very bad planKnow what problems can ariseLearn the responses and solutions to problems before they are neededKnow everything there is to know about Title and what that meansKnow who a "protected class" individual isLearn the "back doors"Learn human natureUnderstand timelinesUnderstand regulation enforcement (some of these "mistakes" have a 10 year statue of limitations ( they can charge you 10 years AFTER you do the transaction) and carry hefty fines and possible imprisonmentThe court doesn't accept "I didn't know" for an answer"Know that the source of the lead plays a serious role in some states and federallyKnow how much of a "profit" pushes the boundaries to invite an investigationYou can be sued by the seller if you don’t do things correctlyYou are automatically at fault if an investigator or attorney or regulator gets involved.

Partnering is generally a bad idea, at least partner with a strager, so if you end up in court, you don't loose your family on top of that!  

Depending upon the details of the case, the Court will issue an order that provides the specific distribution of funds that are obtained at a sale.

You either have to get the courts to grant you possession or you need written confirmation from the tenant.