Your other consideration before ever buying property outright is the cost of equity release in the future.
If at some point in the future, you are having some form of financial trouble or need money for some reason you will need to either sell your property or use equity release.
If the market is very slow, then selling may not be a feasible solution.
Equity release is a solution but it can be expensive. If you have insufficient income, in the banks view, to support the equity release mortgage, then your only option is self-cert equity release. So, again, there is a solution, but again, it can be an expensive one. You don´t want to be sat in Tenerife in 10 years with a €300,000 house but no money to put food on the table - this DOES happen, believe me!
Taking plenty of time to decide exactly what your priorities are today and will be/could be in the future could save you a lot of hassle and money. And be pessimistic rather than optimistic when you consider what may happen. Think about it like this:
The chances of something unexpected and bad happening - 15%.
The chances of something unexpected and very bad happening - 5%.
Which sounds like a fair enough risk BUT, if 1,000 people in your shoes moved to Tenerife and did exactly the same as you, 150 would have something bad happen and 50 of them would have serious problems. How many expats live here? Adds up to a lot of unexpected problems.
Having money available, or being fully insured, when these things crop up often helps. Find a GOOD insurance broker once you get here and make sure you have comprehensive but good value cover.
I remember an alarming statistic from an insurance seminar I attended once -
"The average adult has a 1 in 3 chance of suffering some form of critical illness before the age of 60."
So the risk to a couple is well worth mitigating.
Sorry for such a depressing post

but do give due consideration to this side of life - you never know when its going to punch you in the face.