I'm new to this so just wondering besides wood, what other materials & tools will I need to build a window seat bed? I also need it to hold 300-500 lbs. It will be used with a Twin mattress and has to be able to hold 2 adults. It will be indoors for a bedroom with rug floors. It's not just going to be a raised wood platform due to also needing the extra storage space underneath the "window seat bed". The measurements are (89" L x 42" W x 24" H). Please any ideas or suggestions on any of this will be helpful.
NOTE*** I've heard of using kitchen cabinets as the storage space under the bed but that's not an option, If I can learn how to do it, I'd rather build it myself. I'm on a budget.