Key questions for you re. French leaseback:
1. How much do you have to invest? €100k is a lot of equity; you could diverisfy into at least two properties, in different types of property investments or other countries to spread your risk.
2. Leverage. Much of propery investment is much about the bank's money. if you bought a French leaserback for €100k, you would be able to borrow on a non-recourse basis about 70% of the purchase price from a French bank. With a 5% rental yield, this should leave you in a cash neutral position on an annual basis but you will only have spent €30k and will have €70k to invest in other properties.
3. Time horizons. With a leaseback, you will (effectively) be tied to thew investment for the first 9/11 years. Leasebacks are notoriously illiquid, unlike a property with a shorter term tenant. So, if you might need your money quickly, or before 9/11 years, think again.
4. Attitude to Risk. A leaseback with a good national operator, in a good location, is not the riskiest investment. It should show relatively modest capital appreciation over the 9/11 year period but if you have chosen well, you will have no voids, no tenant hassles, and peace of mind.