You also win from the standpoint of less stress in finding someone that will believe you are telling the truth about your actual income. 

I estimate 350-500K in repairs and the ARV based on conservatives numbers at 8% cap is around 1.6 million.I have been "winging" it on my previous buildings to an extent but all of them turned out great with excellent cash flow and big forced appreciation. 

Just pay very close attention to the legal steps/requirements to evict in your State, or else the tenant may win on a minor technicality and you have to start all over.You can always wait for the Lease to expire then give proper notice that you will NOT be renewing the Lease. 

I was bidding on them at auction simultaneously and ended up winning both.

Sound like a win to me.

I think it’s a win-win since they will make 10% on the rehab, I get to be more hands off and they will get to manage the property at the end of the rehab.

Any platforms that allows to keep track to have this at my fingertips in an app that isn't an Excel spreadsheet?

A tool I have communicated to the cleaners I ultimately did not hire was to ask them if they would be interested in working on an "emergency" basis just in case my new hires are not reliable... they like this opportunity and will likely make it a point to deliver as a chance to win business.

They can definitely be an excellent resource for these sorts of questions too. 

If you're familiar with Microsoft Excel or Google Sheets, those are going to be the easiest solutions to build a customized tracker for your portfolio.