I agree with twayneb. The secret to such things is to simply be content.
Last week, we had some relatives fly in to visit us. My visiting nephew is very young, so we needed a "booster seat" in the car to comply with California law. We found a nice used one on Craigslist, so I drove to a nearby town to pick it up.
In the course of the conversation, we spoke about the cost of living in California. He mentioned that his Hawaiian father used to tell him, "There are two ways to be rich. One is to earn more. The other is to desire less."
This is not a Biblical proverb, but the Biblical concept of contentment is almost the same. I Timothy 6:6 states, "Godliness with contentment is great gain." This is the same book (and in the immediately prior chapter) that speaks of the responsibility that a man has to take care of the needs of his family or risk being "worse than an infidel" (I Timothy 5:8).
In other words, it is not possessions that are a sin. It is the lustful pursuit of such things -- the want and desire for so much more -- that reeks of greed. It is the great flaw of the prosperity movement that literally teaches the lust of the flesh, lust of the eyes and the pride of life as a virtue rather than a vice.
As for ownership: In the earliest days of the Church (Acts 4-5), believers often took land that they owned, sold it and gave the proceeds to the church. There was no command to do this. Later believers in the book of Acts weren't recorded as having done this. It may have been a practice out of necessity, given the fact that the earliest believers were already facing arrest, imprisonment and even death (such as from the hand of Saul a few chapters later).
Ananias and Sapphira pretended to do the same. They sold some property and gave MOST of it to the Church, but in the guise of having given it all.
Peter's response was quite telling: "Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land? Whiles it remained, was it not thine own? and after it was sold, was it not in thine own power? why hast thou conceived this thing in thine heart? thou hast not lied unto men, but unto God" (Acts 5:3-4).
Peter was explicitly stating that this land belonged to this couple...and that they could have done whatever they wanted with it. Yet they chose to LIE by pretending to have laid it ALL at the apostles' feet.
I suppose that this is one of those areas where it seems that God deals with believers on an individual basis. Jesus told the rich young ruler to sell everything he owned, give it to the poor and then follow him (Luke 18:22-27). Yet Zacchaeus, that wee little man, gave just half of his belongings to the poor (Luke 19:8-10). However, Jesus said that salvation had come to his house.
It seems that Jesus is more interested in the condition of the heart. Are you willing to give it all up for the sake of the Cross? Or do we tenaciously hold on to things of this world -- including the pleasures that we often work tenaciously for?
David Wilkerson used to preach that we should be so detached from the things of this world that we are ready to leave it at any time. He cited the example of Abraham, who owned so much but would not build a home, instead choosing to live in a tent because he sought for a city whose builder and maker was God. Abraham had learned the secret of contentment. In both poverty or wealth, he was content with following the Lord.
I suppose that there is another extreme as well. I have seen individuals who almost boast about their poverty.
As a young believer, I knew a man who boasted about "living by faith" (aka "no steady job necessary") and would testify about how God always met his needs and the needs of his family. Yet this same man was also the first to tell the church of his needs...in the hope that others would "bless him." After a while, people stopped giving as frequently, and his bills weren't being met. So, he moved to another congregation and did the same thing. I always wondered why this man didn't just go out and get a job. He was able-bodied, had children and owned two late-model vehicles. I suppose that it was easier to put on the guise of being so "detached" from the world...even if he was constantly in need and let others know about it.
I believe that God is our provider. I don't believe that God desires us to be rich or poor. Rather, He desires us to be content with Him. The writer of Proverbs 30 once said, "Give me neither poverty nor riches; feed me with food convenient for me" (Proverbs 30:8). As someone recently pointed out, it isn't money that it is the root of evil...but the love of it (I Timothy 6:10).