Any advice on issues please with Cabrera infrastructure/buying property?

I am thinking of investing in a second home in Cabrera Sierra.I am familiar with the area and have property nearby. I have seen that there are outstanding issues with services and the plans that might mean owners will have to pay alot to improve the infrastructure. What is the latest on this? I do not want to be suddenly hit with a bill for thousands of euros,

Also, notice quite a few properties have been on the market FOR YEARS - and they do not seem to be particularly overpriced or have other obvious issues - is it that the market is very slow? I am worried that if things don't work out I will never be able to resell.

Thanks, any advice appreciated.