Soundproofing my home studio

Hello, I m going to begin the soundproofing of my home studio. For the moment, it's like this: The 2 rooms have the same dimensions: L: 4,7m (15,4feet) l: 3,8m (12,4feet) H: 2,75m (9 feet) under the beams There is a small road 7 (2m) feet in the front of the windows.....sometimes there are cars or tractor...and speed is limited to 18mph (30km/h) I would like to record drum (110-114db)without ear this cars and without too disturb my neighbourg (their house is 5 feet (1,5m) behind my stone wall) I can hear the neighbor's dog barking and the little birds I was thinking perhaps to reach a 60db of attenuation. I would like to resolve 4 problems: 1: Closing the passage between drum room and kitchen (with a wall and acoustic door window) 2: Improving the soundproofing of the window (perhaps with a second acoustic window) 3: Closing the passage between drum room and "mixing" room (with acoustic door window or 2) 4: Improving separation of the floor between my 2 rooms and between drum room and road...When I stick my ear to the ground, i can ear the cars on the road. The exteriors walls: 23 inch (60 cm) of stone Wall between 2 rooms: 8,6 inch (22cm) of brick Ceiling in earth and beam I've made a color code: yellow: 2 inch (5cm) of polyurethan foam dark grey: 2 inch (5cm) of anhydrite screed mauve: 2,7(7cm) inch of glass wool with 13mm wallboard The mauve walls are ever two leaf walls....so i could made another wall in front of but it will becoming three leaf walls... I don't know if there is problem with my stone wall.....perhaps can i just doubling my windows I also can doubling all the wall of the drum room with 2 layers of gyps and add acoustics doors and windows....but stay the ground and ceiling....(suspended ceiling?, Floating dry floor?) I have 5000€ for this. Can you help me please? Thanks

Say me if i must say you more informations Thanks

Hello, I would like modify my rooms soon. I ve read instructions and tried to respect them if i have all understand. Say me if i have forgot something. For the moment i think doubling the 3 walls of the recording room: - wall on the road side with a second acoustic window - wall between the recording room and studio with an acoustic door window - close the wall between recording room and kitchen and add an acoustic door window. All doubling will be composed by wool and 2 layers and will be decoupling of the floor and celling. The ceiling with beams and the stone wall will not doubling at beginnig because i think it can be good for acoustic. If soundproofing is not enough, in second time, i wiil doubling the stone wall ...and next the ceiling... And if it s not enough to stop vibrations, i will can make a dry screed on the existing floor. Excuse me for my bad english. Thanks for your advices