VERY LARGE COMMERCIAL WINDOW PRICE

I CURRENTLY JUST DO PRESSURE WASHING. HOWEVER, A HOTEL HAS ASKED ME TO TRY TO CLEAN 2 VERY LARGE INSIDE WINDOWS. THESE WINDOWS ARE APPX 12 FT WIDE AND APPX 20 FT TALL. THEY ARE ALSO ELEVATED AND ONE IS POSITIONED ABOVE THE OTHER. THE BOTTOM PORTION OF THE LOWER WINDOW IS AT THE SAME LEVEL AS THE 2ND FLOOR HALL WAY OF THE HOTEL. THERE IS A VERY SMALL LEDGE BELOW THE WINDOW (MAYBE 2 FT WIDE), BUT NOT ENOUGH TO SET UP A LADDER ON. THE BOTTOM PORTION OF THE 2ND WINDOW IS EVEN WITH THE 3RD FLOOR HALLWAY.
NOTE: THERE ARE HALLWAYS ON BOTH SIDES OF THESE WINDOWS, (APPX 10 FT REACH LATERALLY FROM THE 2ND AND 3RD FLOOR HALLWAYS/RAIL.

I OBVIOUSLY HAVE NOT DID ANY WINDOWS FOR HIRE, AND REALIZE THAT I WILL HAVE TO GET SOME QUALITY EQUIPMENT FROM A JANITORIAL STORE, BUT MY QUESTION IS WHAT IS THE BEST WAY TO GET TO THE UPPER PORTION OF THESE WINDOWS? DO I NEED TO GET SOME TYPE OF EXTENTION POLES ? DO THEY MAKE EXTENTIONS FOR CLEANING WINDOWS? IF SO, HOW AND WHAT DO YOU ATTACH TO THE ENDS FOR CLEANING THE WINDOWS? WHATS BEST SOLUTION / CHEMICAL TO CLEAN THE WINDOWS WITH?

ALSO, WHAT DO I CHARGE? COULD BE A ONCE A MONTH DEAL. 1 SIDE FOR SURE, POSSIBLY OTHER SIDE WHICH WILL BE ACCESSIBLE FROM INSIDE A ROOM. NO PROBLEMS USING A LADDER ON 2ND SIDE. PLEASE HELP. BILL


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