The apostolate, unlike the less rigorous path of the simple disciples, is the commission that Jesus gave to those who wish to give everything in the service of the kingdom.
The apostleship, originally a requirement only for the twelve, Jesus did not restrict it only to them. A group of some seventy later disciples can also be considered apostles, and anyone willing to agree to pay the price was accepted by Jesus as an apostle. 
He never taught his followers to avoid earthly possessions, only his twelve apostles. 
Jesus never taught that it was wrong to have wealth. He required only the twelve and the seventy to dedicate all of their worldly possessions to the common cause. 
“You who would follow after me must be willing to pay the price of wholehearted dedication to the doing of my Father’s will. If you would be my disciples, you must be willing to forsake father, mother, wife, children, brothers, and sisters, even your life. 
See also: UB 140:3.1; UB 140:6.9-13; UB 140:8.16; UB 142:7.2; UB 163:2.6,11; UB 163:3.3; UB 165:4.5; UB 165:5.2; UB 171:2.