I agree with the above comments, the last PSA at 0.2 is still high. Some HT protocols try to keep patients at higher levels, such as the famous “cocktails” of Dr. Leibowitz but that is not a common practice of the majority. Moreover, your case belongs to the high risk group for possible distant metastases, systemic cases, because of failed radicals (RP and SRT).
In systemic cases the threshold of a PSA is usually kept much lower. Continuing the agonist shot will take you to those low levels and that should be the target to start your intermittent modality.
I thing that you are doing well in getting second opinions, Try to discuss about the protocol, the on-drugs cycle length and thresholds.
Similarly to you, I have also two failed radical treatments and started HT in November of 2010. The PSA was 1.0 and it went down gradually to a nadir of 0.02 (lesser than 0.05) on the 12th month. I just started my off-drugs period and my doctor informed me that I will go back to the Leuprolide shot (on-drugs cycle) when the PSA reaches the 2.50 level.
Here is my chronology if you are interested; http://www.healthboards.com/boards/cancer-prostate/879442-i-got-lower-psa.html
I hope you find a good oncologist in Spain.
Enjoy the sunshine and “La Vida Loca” of Malaga.