Finally built the treehouse my kids have been begging for

After like 3 months of planning and two weekends of actual work, we finished it yesterday. My 7yo and 9yo were losing their minds. Used mostly scrap lumber from a local mill, cost me maybe $200 in supplies. Built it about 12 feet up in the oak tree in our backyard. Not gonna lie, my wife was terrified the whole time I was up there, but it's solid. We put safety railings on everything and made sure it could hold like 500 lbs. The kids slept out there last night. 10/10 would build again, even though my back is still killing me lol