Welcome to Moca
I travel to Moca several times a year. While there is not much to do in Moca, Santiago is a short drive away if you need a (bigger) city fix. There you will find shopping centers, hospitals, entertainment venues etc.
As far as cost of living (rent, utilities, labor) you can probably stretch your day to day dollar more in Moca. When it comes to purchasing real estate I suggest you rent for a while and get a feel for the area. Also look out for neighborhoods that are zoned for 24hr electricity. I have seen very nice, decently priced homes in Santiago but you have to factor in the cost of living in comparison to Moca.
While there, start building a network for yourself. Get to know your neighbors and ask the locals how to go about finding a good Dr, dentist, vet etc. Visit the Centro de Especialidades, it is a local private hospital. They can probably lead you in the right direction as far as health care and insurance. My father received excellent service there.
The best neighborhoods, in my opinion, are Don Bosco, Villa Estela, Villa Elsa and Hostos. If you value your privacy and peace and quiet, then you can't go wrong with these.
As far as supermarkets, there are 3 or more. I have been to Compres & El Cooperativo in the centre of town. You can find most of your daily needs at there.
Life in Moca is certainly on a slower pace and it will take a while to find your niche. If you can manage the amenities of Santiago and the laid back atmosphere in Moca you'll get along just fine.
Good luck to you.