There are important things to consider when pricing a rental property. Obviously, the area's "average rental amount." Condition, # of rooms, property/yard, access to conveniences, (e.g, shopping, beach, schools, playground) Surrounding neighborhoods is a big one, here where we are.......
We include electric and water in our rents, so that changes what you ask in rent as well.
You would start out with a basic rental cost, and from there, go through all of the above, plus others I didn't mention....and adjust the rent from there.
Sure, you can use professional or expert resources, but quite frankly, it's not necessary.....and I doubt if they would provide this service free of charge.
It is a common sense process that any rational adult can handle easily.