@Rhiannon1307 Sorry to hear that you lost your business but it looks like you found a work around. Losing retail shops, restaurants, vet clinics etc all due to moving has been an issue in this game for a long time & such a bummer.
Through trial and error I learned that if I evict my family and move them to a new house they'll definitely lose the business. Or if I move them via manage households to someone's house, I'll lose the business. The only thing that I have found that works is always moving the family via the phone, 'Move Households'. This always keeps the business's you own intact and you dont' lose progress. Sometimes I've had to get tricky especially if it was another Sim I want to move my Sim's household in with and have that Sim move into my household first (either via 'Ask to Move In' or moving in from Manage Households) & then move everyone out via the Move Households on the phone. But in my experience it's always moving by the phone that has worked for me.
