@Brittney YangFor the actual legal document, get an attorney.

What happens during periods when the demand for legal work is lower?

Alternative is the sherif evicts him and I pay tax and insurance.I know we can have a gentleman's agreement on these things, but im still afraid he might be able to legally sue me if we have a legitimate residential lease?

While there's no strict requirement to match the original mortgage terms, reinvesting the full proceeds without financing or using leverage to enhance returns is key.If you don't reinvest the full amount, any shortfall ("boot") will be subject to capital gains tax, and depreciation recapture may apply.This post does not create a CPA-Client relationship.

The buyer pays taxes on the crypto gain and the seller pays taxes on the property value gain.

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

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.

Because I'm not an accountant or versed in tax code and law wouldn't I want a CPA to ensure everything is legally tight and as advantageous as it can be? 

TIAOne can walk away, or file legal actions.

With an SDIRA, you can use tax-advantaged funds to purchase property, and any income or gains from the investment grow tax-deferred (or tax-free with a Roth SDIRA).