Need advice.

Kim
So long story shorter my DH went through very hard times these past few years. We lost a baby and our home. We moved in with my in laws 2 years ago. My in laws, brother in law, our 2 year old, 3 dogs and 2 cats at the time all under 1 roof. 
Speed up to now.. My parents bought a house and offered us the townhouse they lived in. Its paid off so we just take care of utilities. I am all for this. DH is going back and forth bc hdoesnt want to hurt his parents and he likes having a yard. The dogs tear up the yard and theres no space for just us bc his parents come back and forth to MI every week! 
How do we break it to his parents we appriciate living here but we need to move for our sanity and marriage sake.