Arturo, Maria, and their whole family were so nice and great hosts. Both English and Spanish speakers will have no problem. The room was spacious with a large bed, hammock, and private bathroom as described. They also have a nice rooftop with hammocks and went above and beyond in accommodating me.
The house is a few minutes walking from the riverfront and San Ignacio market (best to go on Saturdays). It's also super easy and cheap to get there from Belize City by public commuter bus in two hours - $9 BZE each way and it drops you off 2 minutes from their house, which is nice because I didn't want to have to spend over $100 for a cab/private transport.
Muchas gracias por la música, comida, y todos!