Pay her consideration and record a Memorandum in the county of the property.  

He said that transferring my properties from my name to an LLC would trigger the due on sale clause.

You need a strong operator / builder / agent / developer to look at all of these considerations and to have studied the market or you have to do it yourself.

How does that work, how difficult is it, what are the considerations?

It's a complete guide to all the key considerations you will need to make and the provisions you'll have to include to ensure your loan is safe and secure.

General considerations include:Income Taxes- Report rental income, distinguishing between short-term and long-term rentals.- Utilize depreciation deductions to reduce taxable income.- Understand passive activity loss rules limiting deduction of losses from passive activities.Capital Gains Taxes- Be aware of tax implications when selling property, considering short-term and long-term rates.- Explore strategies like 1031 exchanges to defer capital gains taxes.Deductions and Expenses- Know eligible deductions: mortgage interest, property taxes, insurance, maintenance, and management fees.- Maintain detailed records of all real estate-related expenses.- Use cost segregation studies to expedite depreciation of your properties to offset large income gains.Entity Structure- Choose appropriate legal structure (LLC, partnership, or S corporation) with consideration for different tax implications.Tax Credits- Explore available credits, like energy-efficient or historic rehabilitation credits.Qualified Business Income (QBI) Deduction- Check eligibility for QBI deduction, providing up to a 20% deduction on qualified business income.Record Keeping- Keep accurate and organized records for tax compliance and audits.State and Local Taxes- Consider varying state and local tax implications, including property and income tax rates.Tax Planning- Engage in proactive tax planning, consulting with professionals for a comprehensive strategy.Tax Changes- Stay informed about changes in federal, state, and local tax laws affecting real estate investments.Remember to consult a real estate tax professional for personalized advice based on your specific situation.

Also, after making the deal, what are some other elements I need to take into consideration to be prepared?

How did you get over that and pull the trigger - or know that it's best to walk away?

This is not for everybody, but figured it could be given consideration!

Hatch for roof access.The landing on the third floor could (technically) easily be extended onto the roof - but realize there are code/safety considerations around that.