I am looking for referrals for an agent that can help get me on track in finding some deals.  

I think you're definitely on the right track.

Not super in depth but I do have a good track record of being honest and hardworking.

Stay away from low priced stuff, 2/1's or 1/1's, blighted areas, rail road tracks, war zones, etc., and apply all other real estate lessons to buying notes as you do to buying the properties.

Tom Chen as per my CPA and asset protection attorney, as long as I can track income and expenses for each property (think Quickbooks or the like), there's no issue with using one set of accounts, especially with a Serial LLC.

I have always been curious how much I spend per month/year and on what, but never got around to start tracking.

Mileage.. would be a self employment deduction, if you didn't get reimbursed and kept track of your mileage I believe you can deduct the mileage cost use.

I would consider 675 for a long time tenant that has a great track record of paying on time.

You are probably better off tracking population changes and permits granted, projects started and projects completed.Even if you find a pattern, the extreme distortions in the market like abnormally low interest rates may make any conclusions questionable.I am not suggesting you do not try, as you will learn a ton in the process.

Track all of your income and expenses in some sort of report form and review it regularly with your employees or Team members that have the kind of talent you have looked for and have the ability to help you to possibly decrease expenses and increase income.