What's better, adding large 4th bedroom or 2 small bedrooms?

[Olivier Mader]

3 - 4  weeks ago, I closed on another property which will be a hold property (rental) and I may sell it after about 5 to 10 years as a rental.. Now, that property needs a full rehab and I'm doing 95+% of all work myself. There is a bonus room that is 22 x 11 feet (inside measurement). Now, I have to decide if I will convert that bonus room into 1 or 2 extra bedrooms. Home is a 3/2 with a 2 car carport (which I will convert into a 2 car garage). 

If I'll go with the 1 extra bedroom option, I would probably just add a walk in closet to the existing bonus room, making it a fairly large extra bedroom. Now, the 2nd option would be to turn that bonus room into 2 bedrooms which will end up being about  9 x 11 each with each of them having a large closet but no walk in closet. Cost would probably be about $700 higher if I'd go with the 2 extra bedroom option. Not sure if it would be a better investment if I go with the 2 extra bedroom option or with the 1 large bedroom option? Adding a 3rd bathroom is too costly and I'm not sure if 2 bathrooms is enough for a 5 bedroom home. So, which option would be the better option when it comes to both, resale and rental value?