It might cause me financial harm as I have to sell more stocks and might pay short term capital gains vs long term capital gains.

Notice when I spoke of London STR I used the words "gain control of a property" and NOT "buy a property"???? 

When investing in high cash-flow markets, I always recommend working with an investor friendly agent so you're able to gain the right insight on the different areas and the risks involved.

Click-through rate (CTR) helps measure how effective your ad is at grabbing attention, and if it’s low, you might need to adjust your targeting or creative.

I haven't lived in it long enough to be exempt from capital gains, good point on that.

Selling gets a tax free gain and allows you to be more liquid; keeping it allows you to have once in a lifetime cheap debt and have that leverage on an appreciating asset. 

This is only a guess, take it with a gain of salt. 

A lot of tired or retiring landlords don't want to pay 3% to a Realtor plus Capital Gains.

Unless you prefer an active job and happy to gain the savings in return - nothing wrong with this. 

However, purchasing the replacement property from an estate where your mother-in-law is the executor and other heirs are your wife's aunts and cousins raises potential related-party concerns under Section 1031(f).The IRS generally prohibits 1031 exchanges between related parties unless both the buyer and seller hold their respective properties for at least two years after the exchange.To stay compliant and avoid disqualification, ensure:The estate sells the property directly before any distributions to heirs.You hold the replacement property for at least two years.The transaction is conducted at fair market value with no prearranged agreements.Given the IRS scrutiny of related-party 1031 exchanges, consult a qualified CPA or 1031 exchange accommodator to structure the deal properly and avoid potential capital gains tax liabilities.This post does not create a CPA-Client relationship.