One person on a different thread on this board offered a very wise suggestion:
If you get to the airport and the airline insists you purchase a return ticket, be sure to purchase a REFUNDABLE ticket (which costs more money at the time of purchase). If you purchase the much cheaper non-refundable ticket and you choose to stay, you lose the money. With the refundable ticket, as soon you arrive, you cancel the ticket and your money is refunded. After that, if you decide to leave after a few weeks or few months, you can purchase the non-refundable one-way ticket back home.
What I did was a bit different, in that I purchased a round-trip ticket with a return after two months. By that time, I had an idea of what I wanted from home that I could not easily find here.
(I hate not giving credit, but I have difficulty finding that one post with the search function. If it was your idea about the refundable ticket, please reply so you may take due credit for an excellent suggestion.)