I agree with Jake. There are good tenants in the RGV but a lot goes into it. A lot of people in South Texas don't have a lot of credit history (they like to pay cash when they can). Where is the property located, North McAllen vs Rio Grande city, what type of property do you have, A,B,C (A would have better tenants than C's generally). Price your unit competitively with the market, do your diligence as Jake says with background/credit checks, and use good software to manage your leads (I like turbotenant and FB marketplace). Get references for the applicants then verify with the references about the applicants. Do phone interviews with the tenants then meet them at the properties if it seems to be a good fit to sign/hand over the keys. Look inside their cars when they show up at the property if possible. How they treat their car may be an indicator of how they treat your unit. Knowing some Spanish helps but is usually not a deal breaker. Think of this process as hiring an employee...