Yes, as said before, there is no such thing as a "teacup" or "micro" pig..... just like the pet store people saying a sulcata will only get as large as the tank it is kept in.
That being said, I think they can make great pets if you have the room and willingness. Glad that you found a friend in...
For grass, we just planted some all natural grass seed from the hardware store in our leos home and when it grows he eats the heck out of it. When it is gone we just plant more!
A 2 lb bag was only a few dollars and lasts a long time.