A few considerations:
1. Assume that even your well-diversified funds will dip, fall, have long stretches of gains much lower than 8%. Because they likely will. Investing the MMM way is for the long haul. 8% can't be expected year after year, consistently. We plan for more like 4-6% (depending on calculation factors) on average, after a long period, at which point we might secure it to begin withdrawing.
2. Slow travelling and working online, would you have enough from your work to cover all expenses, taking nothing from the stash?
3. What are the rental laws in your region? Do they favour landlords or tenants? Are any laws being considered for change? What are the regulations in the building? Are you allowed to rent it out (you probably checked that already)? Are there limits on how many owners can rent out their units, or for how long?
4. Do you have someone local that would be take care of managing the tenancy? For what fee? $0? More than $0?
5. If you wanted to return, would it feel important to you to own again, or could you be happy renting there? (Costs of buying there may go up or down in the meantime, ditto the cost of renting.)
6. Are you a person who would feel nervous having someone controlling your major investment? Some people do; some don't. (I usually do, so sold.)