I would search the BP forums because your tax / legal related questions likely have already been asked.However, it doesn't hurt to still ask the forum what your questions are.

Any tips, warnings, or real-life lessons are welcome! 

You have the ability to sell while limiting your capital gains tax because you lived in 2 of the last 5 years. 

If all goes well, my monthly payments could drop about $60 from a tax reassessment in about six months.

That means creating a clear budget, forecasting cash flow, and maintaining a detailed financial model that tracks both the current and future performance of your portfolio.Tax Optimization & Risk ManagementBeyond financial clarity, strategic tax planning and risk management are essential to safeguard and grow your real estate investments.

The fact that you have a TAX-FREE income is crazy good.  

On your tax return you would report the proceeds, subtract costs and proceeds paid to seller, then the remaining profit would be your flat fee.

I find that it's almost a one stop shop in that I can use it for my business checking and savings accounts, bookkeeping, for rent collection, I can issue virtual credit card, I can create all the financial reports I need to run my real estate business and prepare for tax filing and through their partners I can vet my tenants, develop state-specific leases and more.

Congratulations, you get to share your partners tax burden and pay the depreciation recapture at ordinary income rates. 

If you do place the property in her name, you've got a Gift Tax (Form 709) to complete.