Hi JoGreen, we were in exactly the same situation with Catalan and it would have been fine had we wanted to remain local. My daughter did want to go to university and unfortunately discovered too late that they revert to Castellano in university which was a step too far.
A Catalan/Valencian education makes no sense abroad and with the current economic climate in Spain, many Spanish University Graduates are seeking work abroad.
We do speak English and a Dutch language aswell, so my daughter, who only started with castellano and catalan from age 14, had 4 languages to cope with, never mind wanting to do a science Batxilerat (A level).
So, my advice is, unless you plan to entrench yourself locally, long term, and you have kids, go to the larger spanish speaking (castellano) areas.
Keep in mind, you probably also would want your kids to have some friends who share the same home language...
My youngest is now in a Spanish guarderia in Alicante and it is like a breath of fresh air not having to contend with an extra language AND prejudice...
Unfortunately we had learnt Castellano before we came to Spain many years ago, only to discover we were NOT in Spain, we were in Catalunya, and, as far as the Catalans were concerned, we were speaking the language of the invaders (Castellano), so were treated quite badly...
Hopefully our experience can prevent others from making the same mistake.
