Hi Bug,
is good sometimes just to get it off your chest, it can be hard when it feels your not just contending with your wife but her whole family too and can really lead you to feel bitter. i can imagine you feel you just have to roll with all the decisions leaving you isolated, which manifests into thinking it's just not right for you! Hang in there buddy it may just all come good! Work constructively with the in laws and move them on when they have the deposit they need! Maybe suggest a break for your wife and kids to get away together with you and try to work it out!
remember why you wanted a new life here and although you love wales there must of been a sparkle that brought you here to get a better life!
I had a childhood if holidays in north wales and each one was an adventure, I loved and hanging round the black cat in towyn and it still brings back fond memories.
However I'm now in Perth and no matter how good those memories are they will never pull me back! Like you I have had a daughter here and I can only want her to grow up here in Australia knowing that she will have such a better life.
Start yourself up with an interest and give yourself a new lease if life, don't get down trodden, as you stated! New country! New home! Just adjust the lifestyle mate and rekindle the love you not only had with coming here but also with your wife and family! Show them all the big guy you are can play ball with the best and come out the winner! Where would any of them be if you hadn't took the huge step to get here! Your the winner mate, the family is riding on the coat tales!!
if your ever down mandurah way send me a message and we can have a beer!
gaz.