@Desiree Saldivar, a few thoughts:
1. Short sale: On the surface that may sound good because you get out from under the property, but to qualify you have to be financially distressed and unable to pay the shortfall. The lender does not want to let you off the hook unless its in THEIR best interest.
In addition, a short sale will trash your credit! The lender is basically writing off the shortfall and it will show up on your credit and affect it for years.
2. Subject To: This option is best suited for sellers facing foreclosure who have few options. The loan remains in your name, so if the new owner fails to pay it will affect you and then you need to take legal actions which are not cookie cutter and will require you to pay for a lawyer etc.
3. Creative finance: Like anything else you have to be prepared to deal with the possible difficulties and those could be more impactful than you normally deal with as a landlord.
4. Selling with a tenant in place: What is the mortgage payment and what is the rent? Does it make sense for an investor to buy as a rental and for it to generate a reasonable cash-flow?
5. Why didn't you mention selling with the place VACANT? Often a single family property will sell for the best price to an owner occupant who needs to move into the place. In addition, the property will show better vacant and after a bit of prep.
Yes, you will incur some lost rent, but if you are committed to selling that may well be the best option.
6. If you sell, consider negotiating the commission. Instead of paying 6%, with 3% going to the buyer's agent, maybe you can find an agent to sell it for something like 4.5% with 2% going to the buyer's agent. Be careful though, sometimes you get what you pay for or rather don't pay for!
7. Holding and continuing to rent: If you have a paying tenant, why is this so stressful? If this is working as a rental but you are just not up to landlording from a distance can you hire a local PM and will it still cover your expenses including maintenance, vacancy, and cap ex?
8. How did you end up in a situation where you have no equity? Values have risen substantially in recent years so there are not many people without equity right now.