Husband/Wife pass away year 1777 (Hacienda San Antonio De Padua) - Por Ser Pobre???

They are husband and wife who passed away in year 1777 and at Hacienda San Antonio De Padua, near Huejuquilla El Alto, Jalisco, Mexico they are espanoles and says they are poor?

Joseph Guevara, Espanol - passes away on 1/25/1777
Juana Maria Zarate, Espanola - passes away on 1/29/ 1777

They are husband and wife and found them on the same page. I wonder how can "espanoles" be poor? Doesn't say what the passed away from.

http://oi62.tinypic.com/kdla2f.jpg

http://oi58.tinypic.com/24qmsnq.jpg