J.P.
I have several long term rentals and one here in FL that I will be renting short term (just finished setting it up, but its not listed yet).
I think it depends on where the house is. Mine is 15 minutes from Disney's main gate and the development is always busy with vacationers. I will also be managing it myself since I live 20 minutes away. The companies around here handle everything but they charge up to 30%, after the other costs like utilities, taxes and if you have a mortgage that can add up. I know some companies here will rent them really cheap to just have people in them and that can also be risky with damage.
I have also know some cleaning companies here that steal from the homes or have let friends stay just after vacationers have left without the owners consent. It is always a risk but if the home you are looking at is in a busy vacation area then it is worth it to me. I haven't listed mine yet and I already have people set up for next winter, I do work with my neighbors when they have people looking for two homes to rent.
Just consider all the costs, with renting short term you WILL have to replace things often (linens, towels, etc.) and keep up with painting and wear and tear. I think if you have a mortgage you may break even on the costs.