There are all sorts of weight based trailer towing calculators available online but the number of beds has nothing to do with what you can tow. The limiting factor for anyone towing with a 1/2 ton or less will be, regardless of any other factors, the payload capacity of the vehicle. In your case, with a vehicle with a so-called trailer tow rating of just 5000 lbs, that won't be much. Without even punching numbers into a calculator I can say with confidence you'll be limited to a pretty small trailer, ~ 3000 lbs max dry weight being the most you should be considering. That's pretty small and will almost certainly limit you to smaller 17' and under single axle trailers, whether a TT or even a hybrid. Sorry, but the reality is you just can't tow much with such a limited vehicle as yours. :(