Yes, these are the most important questions. July is monsoon time in Nepal, however, as Nar Phu is a rain shadow area, it will be less rain. I believe you will have a good time on the trip. The high Himalayan weather is not predictable. It could be changed anytime, so must be well prepared for the trek with good enough trekking gear. Thank you very much for informing that you have hiking boots, rain gear, and warm clothes. Regarding equipment, we will provide you with a Cap/T-shirt as complementary and provide a down jacket, Sleeping, and duffle bags during the trek include in our services.  Most of the things you can buy or hire in Kathmandu at a reasonable cost. If would you like to use those things in the future, it would be better to buy them in your country or at a genuine Shop in Kathmandu. Otherwise, you can buy in Kathmandu just for this trek. There is some branded trekking shop like; North Face, Mountain Hardwear, Black Yak, Sonam, Sherpa, Red Fox, Raiko, etc. where you can buy real equipment and it’s not that expensive. Most of the international brand shops are on Trivedi Marg Street in Thamel, next to the most popular place Himalayan Java Coffee Shop.  If you need help, we are glad to assist you.