We also inherited a 140lb. German Shephard/Golden Retriever that was rescued from a shelter when he was 10 years old and were crushed when he needed to be put down four years later for health reasons.
I will gladly walk your pet, assist in it's training and dog-sit for you at your residence.
If time and distance allow and with proper notice I can visit and tuck the dog in for the night, if that would accommodate your short-term needs.
Mileage and travel time rates are negotiable.