Living with a host family has both advantages and disadvantages. Significant advantages are: practicing your Spanish on a daily basis, experiencing Guatemalan life and culture from "the inside", and living in a safe and filling environment (the food is more than sufficient). Some disadvantages might be: lack of privacy, eating at set times (not decided by yourself), and noise because you live with a family with young children.
We, however, have got the perfect solution. We have rented a house from the amazing family Phillip and his wife Rosa, so we have our own privacy. But we eat our meals with the family in their restaurant "Rancho de Rosa". This way we get to practise our Spanish and be part of a family, but with the option of withdrawing and having our own privacy.
When we met Phillip and Rosa we were looking for privacy after two intense weeks with another family – but had we not already stayed with another family I would have surely wanted to stay in the house with Phillip and Rosa because they are such a lovely and warm couple.
You do not have to stay with them as a student though to eat in their restaurant "Rancho de Rosa". It is open everyday from 9.00-20.00 and you can have very cheap, traditional food there (such as rice with refried beans and platanas for 10 quetzals ($1.50)).
Rancho de Rosa is located next to San Pedro Spanish school (and also works with San Pedro Spanish school) in zone 2 of San Pedro.
If you have the chance to drop by there at any time – please send them my love.